diff --git a/ocaml.spec b/ocaml.spec
index b8e9c65..69ece26 100644
--- a/ocaml.spec
+++ b/ocaml.spec
@@ -259,7 +259,7 @@ sed -i '/^EXTRACAMLFLAGS=/aLINKOPTS=-cclib -lm' otherlibs/unix/Makefile
     --disable-native-compiler \
     --disable-native-toplevel \
 %endif
-%ifarch x86_64
+%ifarch %{x86_64}
 %if 0%{?_include_frame_pointers}
     --enable-frame-pointers \
 %endif