diff --git a/src/main.c b/src/main.c
index 7cb1a6d..eed77db 100644
--- a/src/main.c
+++ b/src/main.c
@@ -19,7 +19,6 @@
 
 void dupdate(); //gint function
 //test if jump pressed
-void jump_test(char *jump_pressed, char *jump_buffer, unsigned int *jump_hold);
 int sgn(int number); //return the sign of input double
 
 int callback(volatile void *arg)