diff --git a/env/rhel7/x86_64/sysconfigs/packages.yaml b/env/rhel7/x86_64/sysconfigs/packages.yaml
index 51d6e16..4b2ed3f 100644
--- a/env/rhel7/x86_64/sysconfigs/packages.yaml
+++ b/env/rhel7/x86_64/sysconfigs/packages.yaml
@@ -63,7 +63,7 @@ packages:
   flex:
     require: '%gcc@4.8.5'
   fltk:
-    require: '%gcc@4.8.5'
+    require: '%gcc'
   fontconfig:
     require: '%gcc@4.8.5'
   gams: