diff --git a/Source/Core/VideoCommon/Src/BPMemory.h b/Source/Core/VideoCommon/Src/BPMemory.h
index 0fa4f1cdfc..a9b4be0907 100644
--- a/Source/Core/VideoCommon/Src/BPMemory.h
+++ b/Source/Core/VideoCommon/Src/BPMemory.h
@@ -650,7 +650,7 @@ union FogParam0
 
     float GetA() {
 		union { u32 i; float f; } dummy;
-        dummy.i = ((u32)sign<<31)|((u32)exponent<<23)|((u32)mantissa<<12);
+        dummy.i = ((u32)sign<<31)|((u32)exponent<<23)|((u32)mantissa * 0x7FFFFF / 0x7FF); // scale mantissa from 11 to 23 bits
 		return dummy.f;
 	}
 
@@ -671,7 +671,7 @@ union FogParam3
     // amount to subtract from eyespacez after range adjustment
     float GetC() { 
 		union { u32 i; float f; } dummy;
-		dummy.i = ((u32)c_sign << 31) | ((u32)c_exp << 23) | ((u32)c_mant << 12);
+		dummy.i = ((u32)c_sign << 31) | ((u32)c_exp << 23) | ((u32)c_mant * 0x7FFFFF / 0x7FF); // scale mantissa from 11 to 23 bits
 		return dummy.f;
 	}