diff --git a/Source/Common/Common.vcproj b/Source/Common/Common.vcproj
index ff469900a..e7047f664 100644
--- a/Source/Common/Common.vcproj
+++ b/Source/Common/Common.vcproj
@@ -157,6 +157,10 @@
 				RelativePath=".\path.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\Platform.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\stdafx.cpp"
 				>
@@ -230,6 +234,10 @@
 				RelativePath=".\path.h"
 				>
 			</File>
+			<File
+				RelativePath=".\Platform.h"
+				>
+			</File>
 			<File
 				RelativePath=".\SmartPointer.h"
 				>
diff --git a/Source/Project64-core/N64System/Interpreter/InterpreterOps.cpp b/Source/Project64-core/N64System/Interpreter/InterpreterOps.cpp
index ad3b51589..12c81e95e 100644
--- a/Source/Project64-core/N64System/Interpreter/InterpreterOps.cpp
+++ b/Source/Project64-core/N64System/Interpreter/InterpreterOps.cpp
@@ -21,6 +21,30 @@
 #include <float.h>
 #include <math.h>
 
+#if (defined(_MSC_VER) && (_MSC_VER < 1800))
+double round(double num)
+{
+	return (num - floor(num) > 0.5) ? ceil(num) : floor(num);
+}
+
+float roundf(float num)
+{
+	return (num - floorf(num) > 0.5) ? ceilf(num) : floorf(num);
+}
+#endif
+
+#if (defined(_MSC_VER) && (_MSC_VER < 1700))
+double trunc(double num)
+{
+	return (num < 0) ? ceil(num) : floor(num);
+}
+
+float truncf(float num)
+{
+	return (num < 0) ? ceilf(num) : floorf(num);
+}
+#endif
+
 void InPermLoop();
 void TestInterpreterJump(uint32_t PC, uint32_t TargetPC, int32_t Reg1, int32_t Reg2);
 
diff --git a/Source/Project64-core/N64System/Recompiler/RegInfo.cpp b/Source/Project64-core/N64System/Recompiler/RegInfo.cpp
index fec38842c..48b6ea728 100644
--- a/Source/Project64-core/N64System/Recompiler/RegInfo.cpp
+++ b/Source/Project64-core/N64System/Recompiler/RegInfo.cpp
@@ -16,6 +16,7 @@
 
 #include <stdio.h>
 #include <string.h>
+#include <float.h>
 #include "x86CodeLog.h"
 
 uint32_t CRegInfo::m_fpuControl = 0;