diff --git a/src/color.h b/src/color.h
index 499676e..d6a4307 100644
--- a/src/color.h
+++ b/src/color.h
@@ -5,5 +5,5 @@
 rgb_t applyPalette(char *palette, int val);
 rgb_t RGBcomposite(rgb_t top, float top_a, rgb_t bottom, float bottom_a);
 
-char TempPalette[256*3];
-char PrecipPalette[58*3];
+extern char TempPalette[256*3];
+extern char PrecipPalette[58*3];