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-rw-r--r--src/mame/includes/blockade.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mame/includes/blockade.h b/src/mame/includes/blockade.h
index 5eb392a23fb..b56d92e4813 100644
--- a/src/mame/includes/blockade.h
+++ b/src/mame/includes/blockade.h
@@ -9,7 +9,7 @@ VIDEO_UPDATE( blockade );
/*----------- defined in audio/blockade.c -----------*/
-extern struct Samplesinterface blockade_samples_interface;
+extern const struct Samplesinterface blockade_samples_interface;
DISCRETE_SOUND_EXTERN( blockade );
WRITE8_HANDLER( blockade_sound_freq_w );