diff --git a/build.sh b/build.sh
index 75c4921..13ac751 100755
--- a/build.sh
+++ b/build.sh
@@ -64,7 +64,7 @@ MSYS_NT*|MINGW*) # MSYS2 on Windows
 	fi
 	;;
 Darwin) # macOS
-	CFLAGS="${CFLAGS} -Wno-typedef-redefinition -D_C99_SOURCE"
+	CFLAGS="${CFLAGS} -Wno-typedef-redefinition -D_C99_SOURCE -D_DARWIN_BETTER_REALPATH"
 	UXNEMU_LDFLAGS="$(sdl2-config --cflags --static-libs)"
 	;;
 Linux|*)
diff --git a/src/devices/screen.c b/src/devices/screen.c
index 4012086..bc6b2dd 100644
--- a/src/devices/screen.c
+++ b/src/devices/screen.c
@@ -50,7 +50,8 @@ screen_change(int x1, int y1, int x2, int y2)
 void
 screen_palette(void)
 {
-	int i, shift, colors[4];
+	int i, shift;
+	unsigned long colors[4];
 	for(i = 0, shift = 4; i < 4; ++i, shift ^= 4) {
 		Uint8
 			r = (uxn.dev[0x8 + i / 2] >> shift) & 0xf,