diff --git a/src/Cafe/HW/Espresso/PPCTimer.cpp b/src/Cafe/HW/Espresso/PPCTimer.cpp
index 281ecd62..8e1ed136 100644
--- a/src/Cafe/HW/Espresso/PPCTimer.cpp
+++ b/src/Cafe/HW/Espresso/PPCTimer.cpp
@@ -5,15 +5,6 @@
 #include "util/helpers/fspinlock.h"
 #include "util/highresolutiontimer/HighResolutionTimer.h"
 
-#if BOOST_OS_LINUX || BOOST_OS_MACOS
-static __inline__
-uint64 _umul128(uint64 multiplier, uint64 multiplicand, uint64 *highProduct) {
-	unsigned __int128 x = (unsigned __int128)multiplier * (unsigned __int128)multiplicand;
-	*highProduct = (x >> 64);
-	return x & 0xFFFFFFFFFFFFFFFF;
-}
-#endif
-
 uint64 _rdtscLastMeasure = 0;
 uint64 _rdtscFrequency = 0;
 
diff --git a/src/Common/precompiled.h b/src/Common/precompiled.h
index 1d00311f..b5ee0936 100644
--- a/src/Common/precompiled.h
+++ b/src/Common/precompiled.h
@@ -186,6 +186,12 @@ inline uint64 _rotr64 (uint64 x, sint8 r)
     return (x >> r) | (x << (64 - r));
 }
 
+inline uint64 _umul128(uint64 multiplier, uint64 multiplicand, uint64 *highProduct) {
+    unsigned __int128 x = (unsigned __int128)multiplier * (unsigned __int128)multiplicand;
+    *highProduct = (x >> 64);
+    return x & 0xFFFFFFFFFFFFFFFF;
+}
+
 typedef uint8_t BYTE;
 typedef uint32_t DWORD;
 typedef int32_t LONG;