diff --git a/fir2.c b/fir2.c
index 4c1b277..adcf30a 100644
--- a/fir2.c
+++ b/fir2.c
@@ -67,3 +67,6 @@ float FIRFilter_update(FIRFilter *fir, float inp) {
 
     return out;
 }
+
+int main(void) {
+}