diff --git a/devhelp.spec b/devhelp.spec
index 9306df9..c254193 100644
--- a/devhelp.spec
+++ b/devhelp.spec
@@ -33,7 +33,7 @@ It works natively with API documentation generated by gtk-doc.
 %package devel
 Summary: Library to embed Devhelp in other applications
 Group: Development/Libraries
-Requires: %{name} = %{epoch}:%{version}-%{release}
+Requires: %{name}%{?_isa} = %{epoch}:%{version}-%{release}
 
 %description devel
 Devhelp is an API documentation browser for the GNOME desktop.