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-rw-r--r--libguile/procs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/procs.h b/libguile/procs.h
index 3059bd350..4721884ce 100644
--- a/libguile/procs.h
+++ b/libguile/procs.h
@@ -84,7 +84,7 @@ typedef struct
SCM documentation;
} scm_subr_entry;
-#define SCM_SUBRNUM(subr) (SCM_CAR (subr) >> 8)
+#define SCM_SUBRNUM(subr) (SCM_CARW (subr) >> 8)
#define SCM_SET_SUBRNUM(subr, num) \
SCM_SETCAR (subr, (num >> 8) + SCM_TYP7 (subr))
#define SCM_SUBR_ENTRY(x) (scm_subr_table[SCM_SUBRNUM (x)])