diff --git a/Makefile.common b/Makefile.common
index 216b19f..3cd4c3d 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -293,6 +293,10 @@ koji: prekoji-checks kojidef
 		echo "Error: Must be on the master branch to submit to koji" >&2; \
 		exit 1; \
 	fi; \
+	if ! git diff --quiet HEAD ${SPECFILE}; then \
+		echo "Error: All changes to ${SPECFILE} must be committed first" >&2; \
+		exit 1; \
+	fi; \
 	if git rev-parse --verify --quiet origin/master > /dev/null; then \
 		git pull --rebase; \
 	fi