diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 9a9b428..59b06cc 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -11,6 +11,7 @@
 Anthony Sorace <a@9srv.net>
 Arvindh Rajesh Tamilmani <art@a-30.net>
 Benjamin Huntsman <BHuntsman@mail2.cu-portland.edu>
+Caio Oliveira <cmarcelo@gmail.com>
 Christopher Brannon <chris@the-brannons.com>
 David du Colombier <0intro@gmail.com>
 David Jeannot <djeannot24@gmail.com>
diff --git a/src/cmd/devdraw/x11-keysym2ucs.c b/src/cmd/devdraw/x11-keysym2ucs.c
index f6066b1..108f153 100644
--- a/src/cmd/devdraw/x11-keysym2ucs.c
+++ b/src/cmd/devdraw/x11-keysym2ucs.c
@@ -826,49 +826,52 @@
 VISIBLE
 long _p9keysym2ucs(KeySym keysym)
 {
-    int min = 0;
-    int max = sizeof(keysymtab) / sizeof(struct codepair) - 1;
-    int mid;
+	int min = 0;
+	int max = sizeof(keysymtab) / sizeof(struct codepair) - 1;
+	int mid;
 
-    switch(keysym){
-    case 0xfe53: /*dead tilde*/
-        keysym = 0x007e; /*asciitilde*/
-        break;
-    case 0xfe52: /*dead_circumflex*/
-        keysym = 0x005e; /*asciicircum*/
-        break;
-    case 0xfe51: /*dead_acute*/
-        keysym = 0x0027; /*apostrophe*/
-        break;
-    case 0xfe50: /*dead_grave*/
-        keysym = 0x0060; /*grave*/
-        break;
-    default:
-        break;
-    }
-
-    /* first check for Latin-1 characters (1:1 mapping) */
-    if ((keysym >= 0x0020 && keysym <= 0x007e) ||
-        (keysym >= 0x00a0 && keysym <= 0x00ff))
-        return keysym;
-
-    /* also check for directly encoded 24-bit UCS characters */
-    if ((keysym & 0xff000000) == 0x01000000)
-	return keysym & 0x00ffffff;
-
-    /* binary search in table */
-    while (max >= min) {
-	mid = (min + max) / 2;
-	if (keysymtab[mid].keysym < keysym)
-	    min = mid + 1;
-	else if (keysymtab[mid].keysym > keysym)
-	    max = mid - 1;
-	else {
-	    /* found it */
-	    return keysymtab[mid].ucs;
+	switch(keysym){
+	case 0xfe53: /*dead tilde*/
+		keysym = 0x007e; /*asciitilde*/
+		break;
+	case 0xfe52: /*dead_circumflex*/
+		keysym = 0x005e; /*asciicircum*/
+		break;
+	case 0xfe51: /*dead_acute*/
+		keysym = 0x0027; /*apostrophe*/
+		break;
+	case 0xfe50: /*dead_grave*/
+		keysym = 0x0060; /*grave*/
+		break;
+	case 0xfe57: /*dead_diaresis*/
+		keysym = 0x0022; /*quotedbl*/
+		break;
+	default:
+		break;
 	}
-    }
 
-    /* no matching Unicode value found */
-    return -1;
+	/* first check for Latin-1 characters (1:1 mapping) */
+	if ((keysym >= 0x0020 && keysym <= 0x007e) ||
+	    (keysym >= 0x00a0 && keysym <= 0x00ff))
+		return keysym;
+
+	/* also check for directly encoded 24-bit UCS characters */
+	if ((keysym & 0xff000000) == 0x01000000)
+		return keysym & 0x00ffffff;
+
+	/* binary search in table */
+	while (max >= min) {
+		mid = (min + max) / 2;
+		if (keysymtab[mid].keysym < keysym)
+			min = mid + 1;
+		else if (keysymtab[mid].keysym > keysym)
+			max = mid - 1;
+		else {
+			/* found it */
+			return keysymtab[mid].ucs;
+		}
+	}
+
+	/* no matching Unicode value found */
+	return -1;
 }