diff --git a/src/cmd/scat/dssread.c b/src/cmd/scat/dssread.c
index 06f0135..bd72132 100644
--- a/src/cmd/scat/dssread.c
+++ b/src/cmd/scat/dssread.c
@@ -4,7 +4,7 @@
 #include	"sky.h"
 
 static	void	dodecode(Biobuf*, Pix*, int, int, uchar*);
-static	long	getlong(uchar*);
+static	int32	getlong(uchar*);
 int	debug;
 
 Img*
@@ -107,7 +107,7 @@
 }
 
 static
-long	getlong(uchar *p)
+int32	getlong(uchar *p)
 {
 	return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
 }
diff --git a/src/cmd/scat/patch.c b/src/cmd/scat/patch.c
index 27d04ed..583a7c7 100644
--- a/src/cmd/scat/patch.c
+++ b/src/cmd/scat/patch.c
@@ -35,7 +35,7 @@
 		(*deg)++;
 }
 
-long
+int32
 patcha(Angle ra, Angle dec)
 {
 	ra = DEG(ra);
@@ -61,7 +61,7 @@
 	/* 90 */
 };
 
-long
+int32
 patch(int rah, int ram, int deg)
 {
 	int ra, dec;
diff --git a/src/cmd/scat/plate.h b/src/cmd/scat/plate.h
index f2786f6..b4c5b3f 100644
--- a/src/cmd/scat/plate.h
+++ b/src/cmd/scat/plate.h
@@ -90,7 +90,7 @@
 	float	xi;
 	float	eta;
 };
-typedef	long	Type;
+typedef	int32	Type;
 
 typedef struct	Image	Image;
 struct	Image
diff --git a/src/cmd/scat/plot.c b/src/cmd/scat/plot.c
index e002028..ade4ac5 100644
--- a/src/cmd/scat/plot.c
+++ b/src/cmd/scat/plot.c
@@ -10,8 +10,8 @@
 #include "sky.h"
 
 	/* convert to milliarcsec */
-static long	c = MILLIARCSEC;	/* 1 degree */
-static long	m5 = 1250*60*60;	/* 5 minutes of ra */
+static int32	c = MILLIARCSEC;	/* 1 degree */
+static int32	m5 = 1250*60*60;	/* 5 minutes of ra */
 
 DAngle	ramin;
 DAngle	ramax;
@@ -40,8 +40,8 @@
 
 Planetrec	*planet;
 
-long	mapx0, mapy0;
-long	mapra, mapdec;
+int32	mapx0, mapy0;
+int32	mapra, mapdec;
 double	mylat, mylon, mysid;
 double	mapscale;
 double	maps;
@@ -235,7 +235,7 @@
 }
 
 int
-maptoxy(long ra, long dec, double *x, double *y)
+maptoxy(int32 ra, int32 dec, double *x, double *y)
 {
 	double lat, lon;
 	struct place pl;
@@ -255,7 +255,7 @@
 /* end of 'heavens' section */
 
 int
-setmap(long ramin, long ramax, long decmin, long decmax, Rectangle r, int zenithup)
+setmap(int32 ramin, int32 ramax, int32 decmin, int32 decmax, Rectangle r, int zenithup)
 {
 	int c;
 	double minx, maxx, miny, maxy;
@@ -298,7 +298,7 @@
 }
 
 Point
-map(long ra, long dec)
+map(int32 ra, int32 dec)
 {
 	double x, y;
 	Point p;
@@ -456,7 +456,7 @@
 }
 
 int
-bbox(long extrara, long extradec, int quantize)
+bbox(int32 extrara, int32 extradec, int quantize)
 {
 	int i;
 	Record *r;
@@ -566,7 +566,7 @@
 }
 
 int
-gridra(long mapdec)
+gridra(int32 mapdec)
 {
 	mapdec = abs(mapdec)+c/2;
 	mapdec /= c;
@@ -586,7 +586,7 @@
 {
 	int i, j, k;
 	char *t;
-	long x, y;
+	int32 x, y;
 	int ra, dec;
 	int m;
 	Point p, pts[10];
diff --git a/src/cmd/scat/scat.c b/src/cmd/scat/scat.c
index f8c1ee6..26bea1c 100644
--- a/src/cmd/scat/scat.c
+++ b/src/cmd/scat/scat.c
@@ -26,9 +26,9 @@
 Mindexrec	mindex[NMrec];
 Namerec		name[NName];
 Bayerec		bayer[NBayer];
-long		con[MAXcon];
+int32		con[MAXcon];
 ushort		conindex[Ncon+1];
-long		patchaddr[Npatch+1];
+int32		patchaddr[Npatch+1];
 
 Record	*rec;
 Record	*orec;
@@ -46,10 +46,10 @@
 int	conindexdb;
 int	patchdb;
 char	parsed[3];
-long	nrec;
-long	nreca;
-long	norec;
-long	noreca;
+int32	nrec;
+int32	nreca;
+int32	norec;
+int32	noreca;
 
 Biobuf	bin;
 Biobuf	bout;
@@ -132,7 +132,7 @@
 
 
 void
-Eread(int f, char *name, void *addr, long n)
+Eread(int f, char *name, void *addr, int32 n)
 {
 	if(read(f, addr, n) != n){	/* BUG! */
 		fprint(2, "scat: read error on %s\n", name);
@@ -156,17 +156,17 @@
 	return skipbl(s);
 }
 
-/* produce little-endian long at address l */
-long
-Long(long *l)
+/* produce little-endian int32 at address l */
+int32
+Long(int32 *l)
 {
 	uchar *p;
 
 	p = (uchar*)l;
-	return (long)p[0]|((long)p[1]<<8)|((long)p[2]<<16)|((long)p[3]<<24);
+	return (int32)p[0]|((int32)p[1]<<8)|((int32)p[2]<<16)|((int32)p[3]<<24);
 }
 
-/* produce little-endian long at address l */
+/* produce little-endian int32 at address l */
 int
 Short(short *s)
 {
@@ -254,7 +254,7 @@
 patchopen(void)
 {
 	Biobuf *b;
-	long l, m;
+	int32 l, m;
 	char buf[100];
 
 	if(patchdb == 0){
@@ -309,10 +309,10 @@
 }
 
 int
-loadngc(long index)
+loadngc(int32 index)
 {
 	static int failed;
-	long j;
+	int32 j;
 
 	ngcopen();
 	j = (index-1)*sizeof(NGCrec);
@@ -343,9 +343,9 @@
 }
 
 int
-loadabell(long index)
+loadabell(int32 index)
 {
-	long j;
+	int32 j;
 
 	abellopen();
 	j = index-1;
@@ -408,7 +408,7 @@
 }
 
 int
-loadpatch(long index)
+loadpatch(int32 index)
 {
 	int i;
 
@@ -446,7 +446,7 @@
 {
 	int i, j, notflat;
 	Record *or;
-	long key;
+	int32 key;
 
     loop:
 	copy();
@@ -759,7 +759,7 @@
 	int i;
 	int x, y;
 	Record *or;
-	long dec, ra, ndec, nra;
+	int32 dec, ra, ndec, nra;
 	int rdeg;
 
 	flatten();
@@ -807,7 +807,7 @@
 	int i;
 	int x, y, xx;
 	Record *or;
-	long min, circle;
+	int32 min, circle;
 	double factor;
 
 	flatten();
@@ -853,11 +853,11 @@
 pplate(char *flags)
 {
 	int i;
-	long c;
+	int32 c;
 	int na, rah, ram, d1, d2;
 	double r0;
 	int ra, dec;
-	long ramin, ramax, decmin, decmax;	/* all in degrees */
+	int32 ramin, ramax, decmin, decmax;	/* all in degrees */
 	Record *r;
 	int folded;
 	Angle racenter, deccenter, rasize, decsize, a[4];
@@ -1006,7 +1006,7 @@
 	char *starts, *inputline=s, *t, *u;
 	Record *r;
 	Rune c;
-	long n;
+	int32 n;
 	double x;
 	Angle ra;
 
@@ -1526,7 +1526,7 @@
 	Abellrec *a;
 	Planetrec *p;
 	int i, rah, ram, dec, nn;
-	long key;
+	int32 key;
 
 	if(r) switch(r->type){
 	default:
diff --git a/src/cmd/scat/sky.h b/src/cmd/scat/sky.h
index 5304585..158dd1c 100644
--- a/src/cmd/scat/sky.h
+++ b/src/cmd/scat/sky.h
@@ -1,3 +1,5 @@
+typedef s32int int32;
+
 #define DIR	"#9/sky"
 /*
  *	This code reflects many years of changes.  There remain residues
@@ -135,9 +137,9 @@
 #define	NPlanet			20
 
 typedef float	Angle;	/* in radians */
-typedef long	DAngle;	/* on disk: in units of milliarcsec */
+typedef int32	DAngle;	/* on disk: in units of milliarcsec */
 typedef short	Mag;	/* multiplied by 10 */
-typedef long	Key;	/* known to be 4 bytes, unfortunately */
+typedef int32	Key;	/* known to be 4 bytes, unfortunately */
 
 /*
  * All integers are stored in little-endian order.
@@ -203,7 +205,7 @@
 	char	compid[2];
 	char	hdcode;
 	char	pad1;
-	long	hd;		/* HD catalog number */
+	int32	hd;		/* HD catalog number */
 	char	name[3];	/* name[0]=alpha name[1]=2 name[3]=ori */
 	char	nname;		/* number of prose names */
 	/* 36 bytes to here */
@@ -218,7 +220,7 @@
 
 typedef struct Bayerec Bayerec;
 struct Bayerec{
-	long	sao;
+	int32	sao;
 	char	name[3];
 	char	pad;
 };
@@ -234,22 +236,22 @@
 
 typedef struct Namerec Namerec;
 struct Namerec{
-	long	sao;
-	long	ngc;
-	long	abell;
+	int32	sao;
+	int32	ngc;
+	int32	abell;
 	char	name[36];	/* null terminated */
 };
 
 typedef struct Patchrec Patchrec;
 struct Patchrec{
 	int	nkey;
-	long	key[60];
+	int32	key[60];
 };
 
 typedef struct Record Record;
 struct Record{
 	Type	type;
-	long	index;
+	int32	index;
 	union{
 		SAOrec	sao;
 		NGCrec	ngc;
@@ -287,7 +289,7 @@
 	float	xi;
 	float	eta;
 };
-typedef	long	Pix;
+typedef	int32	Pix;
 
 typedef struct	Img Img;
 struct	Img
@@ -340,7 +342,7 @@
 extern	char	*desctab[][2];
 extern	Name	names[];
 extern	Record	*rec;
-extern	long		nrec;
+extern	int32		nrec;
 extern	Planetrec	*planet;
 /* for bbox: */
 extern	int		folded;
@@ -365,8 +367,8 @@
 extern int parsename(char*);
 extern void radec(int, int*, int*, int*);
 extern int btag(short);
-extern long patcha(Angle, Angle);
-extern long patch(int, int, int);
+extern int32 patcha(Angle, Angle);
+extern int32 patch(int, int, int);
 extern char*hms(Angle);
 extern char*dms(Angle);
 extern char*ms(Angle);
@@ -374,7 +376,7 @@
 extern char*dm(Angle);
 extern char*deg(Angle);
 extern char*hm5(Angle);
-extern long dangle(Angle);
+extern int32 dangle(Angle);
 extern Angle angle(DAngle);
 extern void prdesc(char*, char*(*)[2], short*);
 extern double	xsqrt(double);
@@ -406,7 +408,7 @@
 extern char*	alpha(char*, char*);
 extern char*	skipbl(char*);
 extern void	flatten(void);
-extern int		bbox(long, long, int);
+extern int		bbox(int32, int32, int);
 extern int		inbbox(DAngle, DAngle);
 extern char*	nameof(Record*);