diff --git a/src/vmath.h b/src/vmath.h
index 58d6ed1..87749c3 100644
--- a/src/vmath.h
+++ b/src/vmath.h
@@ -75,7 +75,7 @@ float vmagnitudef(Vector a) {
 }
 static inline
 float vsqrmagnitudef(Vector a) {
-    return a.x*a.x + a.y*a.y;
+    return fabsf(a.x*a.x) + fabsf(a.y*a.y);
 }
 static inline
 Vector vnormalizedf(Vector a) {