diff --git a/src/anim.c b/src/anim.c
index 70103e8..9f402d4 100644
--- a/src/anim.c
+++ b/src/anim.c
@@ -22,10 +22,6 @@ static inline double stop_offset(hexagram_anim *anim, size_t index) {
     return offset;
 }
 
-static inline size_t stop_index(hexagram_anim *anim, double offset) {
-    return 0;
-}
-
 int hexagram_anim_step(hexagram_anim *anim) {
     struct timeval tv;
     double offset = 0.0, interval, progress;