diff --git a/flex.spec b/flex.spec
index e8b73d7..608bec6 100644
--- a/flex.spec
+++ b/flex.spec
@@ -20,6 +20,7 @@ Patch3: flex-yy_buf_size.patch
 Patch4: flex-yybytes_len.patch
 
 Requires: m4
+BuildRequires:  gcc
 BuildRequires: gettext bison m4 help2man
 Requires(post): /sbin/install-info
 Requires(preun): /sbin/install-info