diff --git a/utils/gtf/gtfcalc.c b/utils/gtf/gtfcalc.c
index 217eac7..e409578 100644
--- a/utils/gtf/gtfcalc.c
+++ b/utils/gtf/gtfcalc.c
@@ -64,7 +64,7 @@ static GTF_constants GC = {
 
 /*-------------------------- Implementation -------------------------------*/
 
-static double round(double v)
+double round(double v)
 {
 	return floor(v + 0.5);
 }