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Diffstat (limited to 'src/emu/cpu/alto2/a2roms.h')
-rw-r--r--src/emu/cpu/alto2/a2roms.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/cpu/alto2/a2roms.h b/src/emu/cpu/alto2/a2roms.h
index f1ffba032da..abd218344c9 100644
--- a/src/emu/cpu/alto2/a2roms.h
+++ b/src/emu/cpu/alto2/a2roms.h
@@ -30,7 +30,7 @@ typedef struct {
} prom_load_t;
#define ZERO 0
-#define KEEP ~0
+#define KEEP ~0U
#define AMAP_DEFAULT {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}
#define AMAP_CONST_PROM {3,2,1,4,5,6,7,0,}