diff --git a/src/misc.c b/src/misc.c
index 6b3336d9..9bcd6b8c 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -256,7 +256,7 @@ void SlideWindows(Window *wins[], int n, int from_x, int from_y, int to_x, int t
 	eatExpose();
 }
 
-char *ShrinkString(WMFont * font, char *string, int width)
+char *ShrinkString(WMFont *font, const char *string, int width)
 {
 	int w, w1 = 0;
 	int p;
@@ -296,7 +296,7 @@ char *ShrinkString(WMFont * font, char *string, int width)
 	}
 	strcat(text, "...");
 	width -= WMWidthOfString(font, "...", 3);
-	pos = string;
+
 	p1 = 0;
 	p2 = p;
 	t = (p2 - p1) / 2;
diff --git a/src/misc.h b/src/misc.h
index 39b4d328..251afff6 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -35,7 +35,7 @@ void SlideWindows(Window *wins[], int n, int from_x, int from_y, int to_x, int t
 void ParseWindowName(WMPropList * value, char **winstance, char **wclass, char *where);
 void SendHelperMessage(WScreen * scr, char type, int workspace, char *msg);
 
-char *ShrinkString(WMFont * font, char *string, int width);
+char *ShrinkString(WMFont *font, const char *string, int width);
 char *FindImage(char *paths, char *file);
 char *ExpandOptions(WScreen * scr, char *cmdline);
 char *GetShortcutString(char *text);