diff --git a/pcsx2/MMI.cpp b/pcsx2/MMI.cpp
index bf4d8e2ecd..cf5983d292 100644
--- a/pcsx2/MMI.cpp
+++ b/pcsx2/MMI.cpp
@@ -171,14 +171,11 @@ void PLZCW() {
 	_PLZCW (1);
 }
 
-__fi void PMFHL_CLAMP(u16 dst, u32 src)
+__fi void PMFHL_CLAMP(u16& dst, s32 src)
 {
-    if ((int)src > (int)0x00007fff)
-	    dst = 0x7fff;
-    else if ((int)src < (int)0xffff8000)
-	    dst = 0x8000;
-    else
-	    dst = (u16)src;
+    if      (src > 0x00007fff)	dst = 0x7fff;
+    else if (src < 0xffff8000)	dst = 0x8000;
+    else						dst = (u16)src;
 }
 
 void PMFHL() {