diff --git a/elkscmd/screen/ansi.c b/elkscmd/screen/ansi.c
index 48bf36823..89c799bb1 100644
--- a/elkscmd/screen/ansi.c
+++ b/elkscmd/screen/ansi.c
@@ -1092,10 +1092,11 @@ RestoreCursor(void)
     return 0;
 }
 
-static void
+static int
 CountChars(int c)
 {
     StrCost++;
+    return 0;
 }
 
 static int
diff --git a/elkscmd/screen/ansi.h b/elkscmd/screen/ansi.h
index 5848604ab..8a6c6aec2 100644
--- a/elkscmd/screen/ansi.h
+++ b/elkscmd/screen/ansi.h
@@ -28,7 +28,7 @@ static int MapCharset(int n);
 static void NewCharset(int old, int new);
 static int SaveCursor(void);
 static int RestoreCursor(void);
-static void CountChars(int c);
+static int CountChars(int c);
 static int CalcCost(char *s);
 static void Goto(int y1, int x1, int y2, int x2);
 static int RewriteCost(int y, int x1, int x2);