diff --git a/zopfli.spec b/zopfli.spec
index 7588663..3ccd5f8 100644
--- a/zopfli.spec
+++ b/zopfli.spec
@@ -9,6 +9,7 @@ Source0:        https://github.com/google/%{name}/archive/%{name}-%{version}.tar
 # https://github.com/google/zopfli/pull/92
 Patch0:         0001-Honor-user-C-XX-FLAGS.patch
 
+BuildRequires:  gcc
 %description
 Zopfli is a compression algorithm bit-stream compatible with
 compression used in gzip, Zip, PNG, HTTP requests, and others. Zopfli