diff --git a/graphviz.spec b/graphviz.spec
index 9041aaece587adf633c8aa977fbe29c72e3b2994..27bb78431b281031fe6d13a98a34f06308cc6e6c 100644
--- a/graphviz.spec
+++ b/graphviz.spec
@@ -15,6 +15,9 @@
 %global OCAML 1
 %endif
 
+%if "%toolchain" == "clang"
+%global OCAML 0
+%endif
 
 Name:               graphviz
 Version:            8.1.0