diff --git a/src/spike.c b/src/spike.c
index 5dcd433..3492a5f 100644
--- a/src/spike.c
+++ b/src/spike.c
@@ -1,8 +1,6 @@
 #include "entityimpl.h"
 #include "rotrect.h"
 
-extern double tick;
-
 IMPL_UPDATE() {
 } IMPL_END