diff --git a/core/msvc9/sourcemod_mm.vcproj b/core/msvc9/sourcemod_mm.vcproj
index 9e2f7322..674c3d48 100644
--- a/core/msvc9/sourcemod_mm.vcproj
+++ b/core/msvc9/sourcemod_mm.vcproj
@@ -203,6 +203,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..\;..\systems;..\..\public;..\..\public\sourcepawn;&quot;$(HL2SDK)\public&quot;;&quot;$(HL2SDK)\public\dlls&quot;;&quot;$(HL2SDK)\public\engine&quot;;&quot;$(HL2SDK)\public\mathlib&quot;;&quot;$(HL2SDK)\public\tier0&quot;;&quot;$(HL2SDK)\public\tier1&quot;;&quot;$(HL2SDK)\public\vstdlib&quot;;&quot;$(SOURCEMM14)&quot;;&quot;$(SOURCEMM14)\sourcemm&quot;;&quot;$(SOURCEMM14)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SOURCEMOD_MM_EXPORTS;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;SOURCEMOD_BUILD;SM_DEFAULT_THREADER"
@@ -447,6 +448,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..\;..\systems;..\..\public;..\..\public\sourcepawn;&quot;$(HL2SDKOB)\public&quot;;&quot;$(HL2SDKOB)\public\engine&quot;;&quot;$(HL2SDKOB)\public\game\server&quot;;&quot;$(HL2SDKOB)\public\mathlib&quot;;&quot;$(HL2SDKOB)\public\tier0&quot;;&quot;$(HL2SDKOB)\public\tier1&quot;;&quot;$(HL2SDKOB)\public\vstdlib&quot;;&quot;$(SOURCEMM16)&quot;;&quot;$(SOURCEMM16)\sourcemm&quot;;&quot;$(SOURCEMM16)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SOURCEMOD_MM_EXPORTS;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;SOURCEMOD_BUILD;SM_DEFAULT_THREADER;ORANGEBOX_BUILD"
@@ -691,6 +693,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..\;..\systems;..\..\public;..\..\public\sourcepawn;&quot;$(HL2SDK)\public&quot;;&quot;$(HL2SDK)\public\dlls&quot;;&quot;$(HL2SDK)\public\engine&quot;;&quot;$(HL2SDK)\public\mathlib&quot;;&quot;$(HL2SDK)\public\tier0&quot;;&quot;$(HL2SDK)\public\tier1&quot;;&quot;$(HL2SDK)\public\vstdlib&quot;;&quot;$(SOURCEMM16)&quot;;&quot;$(SOURCEMM16)\sourcemm&quot;;&quot;$(SOURCEMM16)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SOURCEMOD_MM_EXPORTS;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE;SOURCEMOD_BUILD;SM_DEFAULT_THREADER"
diff --git a/extensions/sdktools/msvc9/sdktools.vcproj b/extensions/sdktools/msvc9/sdktools.vcproj
index 33674010..76729d9d 100644
--- a/extensions/sdktools/msvc9/sdktools.vcproj
+++ b/extensions/sdktools/msvc9/sdktools.vcproj
@@ -121,6 +121,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..;..\sdk;..\..\..\public;..\..\..\public\extensions;..\..\..\public\sourcepawn;&quot;$(HL2SDK)\public&quot;;&quot;$(HL2SDK)\public\dlls&quot;;&quot;$(HL2SDK)\public\engine&quot;;&quot;$(HL2SDK)\public\mathlib&quot;;&quot;$(HL2SDK)\public\tier0&quot;;&quot;$(HL2SDK)\public\tier1&quot;;&quot;$(SOURCEMM14)&quot;;&quot;$(SOURCEMM14)\sourcemm&quot;;&quot;$(SOURCEMM14)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SDK_EXPORTS;_CRT_SECURE_NO_DEPRECATE;SOURCEMOD_BUILD"
@@ -282,6 +283,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..;..\sdk;..\..\..\public;..\..\..\public\extensions;..\..\..\public\sourcepawn;&quot;$(HL2SDKOB)\common&quot;;&quot;$(HL2SDKOB)\public&quot;;&quot;$(HL2SDKOB)\public\engine&quot;;&quot;$(HL2SDKOB)\public\game\server&quot;;&quot;$(HL2SDKOB)\public\mathlib&quot;;&quot;$(HL2SDKOB)\public\tier0&quot;;&quot;$(HL2SDKOB)\public\tier1&quot;;&quot;$(SOURCEMM16)&quot;;&quot;$(SOURCEMM16)\sourcemm&quot;;&quot;$(SOURCEMM16)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SDK_EXPORTS;_CRT_SECURE_NO_DEPRECATE;SOURCEMOD_BUILD;ORANGEBOX_BUILD"
@@ -443,6 +445,7 @@
 			/>
 			<Tool
 				Name="VCCLCompilerTool"
+				AdditionalOptions="/MP"
 				FavorSizeOrSpeed="1"
 				AdditionalIncludeDirectories="..;..\sdk;..\..\..\public;..\..\..\public\extensions;..\..\..\public\sourcepawn;&quot;$(HL2SDK)\public&quot;;&quot;$(HL2SDK)\public\dlls&quot;;&quot;$(HL2SDK)\public\engine&quot;;&quot;$(HL2SDK)\public\mathlib&quot;;&quot;$(HL2SDK)\public\tier0&quot;;&quot;$(HL2SDK)\public\tier1&quot;;&quot;$(SOURCEMM16)&quot;;&quot;$(SOURCEMM16)\sourcemm&quot;;&quot;$(SOURCEMM16)\sourcehook&quot;"
 				PreprocessorDefinitions="WIN32;NDEBUG;_WINDOWS;_USRDLL;SDK_EXPORTS;_CRT_SECURE_NO_DEPRECATE;SOURCEMOD_BUILD"