diff --git a/fontconfig.spec b/fontconfig.spec
index 1253f65..c978dcf 100644
--- a/fontconfig.spec
+++ b/fontconfig.spec
@@ -68,6 +68,8 @@ autoreconf
 %configure	--with-add-fonts=/usr/share/X11/fonts/Type1,/usr/share/X11/fonts/TTF,/usr/local/share/fonts \
 		--disable-static --with-cache-dir=/usr/lib/fontconfig/cache
 
+# regenerate hash functions
+rm src/fcobjshash.h
 make %{?_smp_mflags}
 
 %install