diff --git a/c_impl/src/main.c b/c_impl/src/main.c
index 612bfa8..a05f1a7 100644
--- a/c_impl/src/main.c
+++ b/c_impl/src/main.c
@@ -138,6 +138,7 @@ int main(int argc, char **argv) {
     Sequence seq = initSequence();
     while(seq.indices_end < count) {
         if(nextSeqItem(&seq)) {
+            cleanupSequence(&seq);
             return 1;
         }
     }