diff --git a/ghostscript.spec b/ghostscript.spec
index b028c77..3d62acc 100644
--- a/ghostscript.spec
+++ b/ghostscript.spec
@@ -75,7 +75,7 @@ Group: Applications/Publishing
 A GTK-enabled version of Ghostscript, called 'gsx'.
 
 %prep
-%setup -q -n espgs-%{gs_ver}%{gs_rc}
+%setup -q -n espgs-%{gs_ver}%{?gs_rc:%gs_rc}
 
 # Make it build.
 %patch1 -p1 -b .build