diff --git a/llvm.spec b/llvm.spec
index 8f5ede7..90913a8 100644
--- a/llvm.spec
+++ b/llvm.spec
@@ -17,6 +17,7 @@
 
 # norootforbuild
 
+%define _prefix           /usr
 %define _sharedir        %{_prefix}/share
 %define _revision        132050
 %define _release_version 3.0