diff --git a/third_party/build/resample/libresample.vcproj b/third_party/build/resample/libresample.vcproj
index f1fdca3..1758ef8 100644
--- a/third_party/build/resample/libresample.vcproj
+++ b/third_party/build/resample/libresample.vcproj
@@ -50,7 +50,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -113,7 +113,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -184,7 +184,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -256,7 +256,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -319,7 +319,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -390,7 +390,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -462,7 +462,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -525,7 +525,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -596,7 +596,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -668,7 +668,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -731,7 +731,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -802,7 +802,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -874,7 +874,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -937,7 +937,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -1008,7 +1008,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -1080,7 +1080,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -1143,7 +1143,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -1214,7 +1214,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_LIB;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
diff --git a/third_party/build/resample/libresample_dll.vcproj b/third_party/build/resample/libresample_dll.vcproj
index f04f5b8..0c26b69 100644
--- a/third_party/build/resample/libresample_dll.vcproj
+++ b/third_party/build/resample/libresample_dll.vcproj
@@ -43,7 +43,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -117,7 +117,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -191,7 +191,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -265,7 +265,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -339,7 +339,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>
@@ -413,7 +413,7 @@
 				Name="VCCLCompilerTool"
 				PrecompiledHeaderFile=""
 
-				PreprocessorDefinitions=""
+				PreprocessorDefinitions="_WINDOWS;_USRDLL;LIBRESAMPLE_DLL_EXPORTS;"
 
 				AdditionalIncludeDirectories=".,../../resample/include"
 			/>