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-rw-r--r--libguile/debug.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/libguile/debug.h b/libguile/debug.h
index ec1868c41..96a4ed0ad 100644
--- a/libguile/debug.h
+++ b/libguile/debug.h
@@ -127,7 +127,9 @@ typedef struct scm_debug_frame
scm_debug_info vect[1];
} scm_debug_frame;
-extern scm_debug_frame *last_debug_info_frame;
+#ifndef USE_THREADS
+extern scm_debug_frame *scm_last_debug_frame;
+#endif
#define SCM_TAILREC (1L << 10)
#define SCM_TRACED_FRAME (1L << 9)