diff --git a/src/engine/math_util.h b/src/engine/math_util.h
index 5b58fee9..af6b7282 100644
--- a/src/engine/math_util.h
+++ b/src/engine/math_util.h
@@ -58,6 +58,11 @@ extern f32 gSineTable[];
 #define ABSF(x) ((x) > 0.0f ? (x) : -(x))
 #define ABSI(x) ((x) > 0    ? (x) : -(x))
 #define ABS(x)  ABSF((x))
+#define absf(x) ABSF((x))
+#define absi(x) ABSI((x))
+#define abs(x)  ABS((x))
+
+#define signum_positive(x) ((x < 0) ? -1 : 1)
 
 #define min(a, b) MIN((a), (b)) // ((a) < (b) ? (a) : (b))
 #define max(a, b) MAX((a), (b)) // ((a) > (b) ? (a) : (b))