diff --git a/ustr.spec b/ustr.spec
index 46402ca..fb3df31 100644
--- a/ustr.spec
+++ b/ustr.spec
@@ -36,6 +36,7 @@ Source0: http://www.and.org/ustr/%{version}/%{name}-%{version}.tar.bz2
 Patch0: c99-inline.patch
 # BuildRequires: make gcc sed
 
+BuildRequires:  gcc
 %description
  Micro string library, very low overhead from plain strdup() (Ave. 44% for
 0-20B strings). Very easy to use in existing C code. At it's simplest you can