diff --git a/srcpkgs/yersinia/template b/srcpkgs/yersinia/template
index e36b3a56e15..f9d57cfe9ff 100644
--- a/srcpkgs/yersinia/template
+++ b/srcpkgs/yersinia/template
@@ -16,3 +16,8 @@ checksum=964f528dbffd904376ab7986e69b1e8639591c929e2f39186ac9ebf2d3bc761f
 if [ -n "$CROSS_BUILD" ]; then
 	hostmakedepends+=" ${makedepends}"
 fi
+
+post_configure() {
+	# configure doesn't honor env CFLAGS
+	vsed -i src/Makefile -e'/^CFLAGS/s/$/ -fcommon/'
+}