diff --git a/Source/Core/Common/Common.vcxproj b/Source/Core/Common/Common.vcxproj
index 615a4f537a..1776d70085 100644
--- a/Source/Core/Common/Common.vcxproj
+++ b/Source/Core/Common/Common.vcxproj
@@ -57,7 +57,7 @@
$(ExternalsDir)SlippiRustExtensions/ffi/includes;%(AdditionalIncludeDirectories)
- IS_PLAYBACK;%(PreprocessorDefinitions)
+ IS_PLAYBACK;DEBUGFAST;%(PreprocessorDefinitions)
diff --git a/Source/Core/VideoCommon/VideoCommon.vcxproj b/Source/Core/VideoCommon/VideoCommon.vcxproj
index 96820dd8fd..d5015ec708 100644
--- a/Source/Core/VideoCommon/VideoCommon.vcxproj
+++ b/Source/Core/VideoCommon/VideoCommon.vcxproj
@@ -73,7 +73,7 @@
$(ExternalsDir)ffmpeg\include;%(AdditionalIncludeDirectories)
- IS_PLAYBACK;%(PreprocessorDefinitions)
+ IS_PLAYBACK;DEBUGFAST;%(PreprocessorDefinitions)
%(AdditionalDependencies)