diff --git a/src/heapsort.c b/src/heapsort.c
index 25c65f1..8580a73 100644
--- a/src/heapsort.c
+++ b/src/heapsort.c
@@ -3,7 +3,7 @@
 
 static void
 uc_sift(unsigned char *base, size_t start, size_t count, size_t width,
-i       uc_hs_cmp cmp, uc_hs_swp swap, void *cookie)
+        uc_hs_cmp cmp, uc_hs_swp swap, void *cookie)
 {
     size_t root = start, child;