1 files changed, 2 insertions, 0 deletions
diff --git a/main.c b/main.c
index 079aba8..b7be46f 100644
--- a/main.c
+++ b/main.c
@@ -197,6 +197,8 @@ int main(int argc, char **argv) {
 	sfree(infiles);
 
 	keywords = get_keywords(sourceform);
+	if (!keywords)
+	    exit(EXIT_FAILURE);
 	gen_citations(sourceform, keywords);
 	subst_keywords(sourceform, keywords);