diff --git a/tools/bmp2rb.c b/tools/bmp2rb.c
index 48068b14a5..f7b92d0e6e 100644
--- a/tools/bmp2rb.c
+++ b/tools/bmp2rb.c
@@ -320,7 +320,7 @@ int transform_bitmap(const struct RGBQUAD *src, long width, long height,
         return 1;
     }
     
-    *dest = (unsigned short *)malloc(dst_w * dst_h);
+    *dest = (unsigned short *)malloc(dst_w * dst_h * sizeof(short));
     if (*dest == NULL)
     {
         debugf("error - Out of memory.\n");