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-rw-r--r--src/mame/includes/circus.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/mame/includes/circus.h b/src/mame/includes/circus.h
index d2705e3d4e0..e80bfb7da68 100644
--- a/src/mame/includes/circus.h
+++ b/src/mame/includes/circus.h
@@ -13,10 +13,10 @@ extern WRITE8_HANDLER( circus_clown_z_w );
DISCRETE_SOUND_EXTERN( circus );
DISCRETE_SOUND_EXTERN( robotbwl );
DISCRETE_SOUND_EXTERN( crash );
-extern struct Samplesinterface circus_samples_interface;
-extern struct Samplesinterface crash_samples_interface;
-extern struct Samplesinterface ripcord_samples_interface;
-extern struct Samplesinterface robotbwl_samples_interface;
+extern const struct Samplesinterface circus_samples_interface;
+extern const struct Samplesinterface crash_samples_interface;
+extern const struct Samplesinterface ripcord_samples_interface;
+extern const struct Samplesinterface robotbwl_samples_interface;
/*----------- defined in video/circus.c -----------*/