diff --git a/configure.ac b/configure.ac
index 90ed6ca..3a68688 100644
--- a/configure.ac
+++ b/configure.ac
@@ -62,7 +62,7 @@ if test "x$enable_framing" = "xyes"; then
       fi
 
       # Add the command line options we need here
-      CONVERT="$CONVERT -bordercolor Transparent -border 1x1"
+      CONVERT="$CONVERT -type ColorSeparation -bordercolor Transparent -border 1x1"
       AC_SUBST(CONVERT)
    else
       AC_MSG_ERROR([ImageMagick is required to build tango-icon-theme])