diff --git a/src/grayscale.cc b/src/grayscale.cc
index 725e305..93fc682 100644
--- a/src/grayscale.cc
+++ b/src/grayscale.cc
@@ -5,7 +5,7 @@
 #include <algorithm>
 
 // 0x596D90
-unsigned char _GreyTable[256];
+static unsigned char _GreyTable[256];
 
 // 0x44FA78
 void grayscalePaletteUpdate(int a1, int a2)
diff --git a/src/grayscale.h b/src/grayscale.h
index dd353c0..f17dd0d 100644
--- a/src/grayscale.h
+++ b/src/grayscale.h
@@ -1,8 +1,6 @@
 #ifndef GRAYSCALE_H
 #define GRAYSCALE_H
 
-extern unsigned char _GreyTable[256];
-
 void grayscalePaletteUpdate(int a1, int a2);
 void grayscalePaletteApply(unsigned char* surface, int width, int height, int pitch);