--- a/scripts/jpeg-version.sh
+++ b/scripts/jpeg-version.sh
@@ -1,2 +1,2 @@
 #!/bin/sh
-echo JPEG_LIB_VERSION | cpp $CFLAGS -include jpeglib.h | tail -1
+${CPP} -include jpeglib.h -dM -E -x c /dev/null | grep 'define JPEG_LIB_VERSION' | cut -f 3 -d' '
