diff --git a/Math/Math/GPUDummy.cpp b/Math/Math/GPUDummy.cpp
index 42662c69b..f0648237b 100644
--- a/Math/Math/GPUDummy.cpp
+++ b/Math/Math/GPUDummy.cpp
@@ -4,7 +4,7 @@
 // </copyright>
 //
 
-#ifndef CPUONLY
+#ifdef CPUONLY
 
 #include "GPUMatrix.cuh"
 #include "GPUSparseMatrix.cuh"
diff --git a/Math/Math/Math.vcxproj b/Math/Math/Math.vcxproj
index 6089ef5d0..73632c370 100644
--- a/Math/Math/Math.vcxproj
+++ b/Math/Math/Math.vcxproj
@@ -109,7 +109,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <PreprocessorDefinitions>NO_SYNC;WIN32;NDEBUG;_WINDOWS;_USRDLL;MATH_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>true</SDLCheck>
-      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>..\..\common\include\;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <FloatingPointModel>Fast</FloatingPointModel>
       <OpenMPSupport>true</OpenMPSupport>