diff --git a/RecastDemo/Contrib/stb_truetype.h b/RecastDemo/Contrib/stb_truetype.h
index bfb1841..07ede59 100644
--- a/RecastDemo/Contrib/stb_truetype.h
+++ b/RecastDemo/Contrib/stb_truetype.h
@@ -2430,7 +2430,10 @@ STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info
 
    if (scale_x == 0) scale_x = scale_y;
    if (scale_y == 0) {
-      if (scale_x == 0) return NULL;
+      if (scale_x == 0) {
+         STBTT_free(vertices, info->userdata);
+         return NULL;
+	  }
       scale_y = scale_x;
    }