diff --git a/Source/Core/VideoCommon/ShaderGenCommon.h b/Source/Core/VideoCommon/ShaderGenCommon.h
index 64d30a0dbc..97dab6acf4 100644
--- a/Source/Core/VideoCommon/ShaderGenCommon.h
+++ b/Source/Core/VideoCommon/ShaderGenCommon.h
@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <cstdarg>
 #include <cstdio>
+#include <iomanip>
 #include <string>
 #include <vector>