diff --git a/src/centpkg/__init__.py b/src/centpkg/__init__.py
index e52a0c9..661a62b 100644
--- a/src/centpkg/__init__.py
+++ b/src/centpkg/__init__.py
@@ -238,6 +238,9 @@ class Commands(Commands):
             # This is so the rhel macro is set for spec files
             "--define",
             "rhel %s" % self._distval.split("_")[0],
+            # This is so the centos macro is set for spec files
+            "--define",
+            "centos %s" % self._distval.split("_")[0],
             # This is so the fedora macro is unset for spec files
             "--eval",
             "%%undefine %s" % self._distunset,