diff --git a/srcpkgs/viking/template b/srcpkgs/viking/template
index 64cbe57868..e0807418ec 100644
--- a/srcpkgs/viking/template
+++ b/srcpkgs/viking/template
@@ -18,3 +18,5 @@ homepage="https://sourceforge.net/projects/viking"
 distfiles="${SOURCEFORGE_SITE}/viking/viking-${version}.tar.bz2"
 checksum=855cbccd5f17ef0dc6d7e2d080a4b20383a079dfb882edd04dba602297030fa8
 patch_args="-Np1"
+
+CFLAGS="-fcommon"