diff --git a/mono-core.spec b/mono-core.spec
index d3c1c74..11d2dff 100644
--- a/mono-core.spec
+++ b/mono-core.spec
@@ -332,6 +332,7 @@ A Library for embedding Mono in your Application.
 License:        LGPLv2.1
 Summary:        Development files for libmono
 Group:          Development/Languages/Mono
+Requires:       libmono-2_0-1 == %version-%release
 Requires:       mono-core == %version-%release
 
 %description -n libmono-2_0-devel