diff --git a/src/headers/vector2d.h b/src/headers/vector2d.h
index 502b428..0edffbf 100644
--- a/src/headers/vector2d.h
+++ b/src/headers/vector2d.h
@@ -42,8 +42,6 @@ typedef SDL_FRect frect_t;
 
 #define EPSILON 0.000001f
 
-__attribute__((const)) float fabsf(float x);
-
 #define is_equal_to_zero(X) (fabsf(X) <= EPSILON)
 
 #define is_not_zero(X) (fabsf(X) > EPSILON)