diff --git a/common/scaler/scale2x.h b/common/scaler/scale2x.h
index 54bfac5b8fc..21017909052 100644
--- a/common/scaler/scale2x.h
+++ b/common/scaler/scale2x.h
@@ -21,6 +21,10 @@
 #ifndef __SCALE2X_H
 #define __SCALE2X_H
 
+#if defined(_MSC_VER)
+#define __restrict__
+#endif
+
 typedef unsigned char scale2x_uint8;
 typedef unsigned short scale2x_uint16;
 typedef unsigned scale2x_uint32;
diff --git a/common/scaler/scale3x.h b/common/scaler/scale3x.h
index 14655d00fab..3f24d884e10 100644
--- a/common/scaler/scale3x.h
+++ b/common/scaler/scale3x.h
@@ -21,6 +21,10 @@
 #ifndef __SCALE3X_H
 #define __SCALE3X_H
 
+#if defined(_MSC_VER)
+#define __restrict__
+#endif
+
 typedef unsigned char scale3x_uint8;
 typedef unsigned short scale3x_uint16;
 typedef unsigned scale3x_uint32;