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-rw-r--r--ext/bigdecimal/bigdecimal.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/bigdecimal/bigdecimal.h b/ext/bigdecimal/bigdecimal.h
index b086c68c17..d6a3f337c6 100644
--- a/ext/bigdecimal/bigdecimal.h
+++ b/ext/bigdecimal/bigdecimal.h
@@ -154,7 +154,7 @@ typedef struct {
*/
VP_EXPORT Real *
-VpNewRbClass(size_t mx, char *str, VALUE klass);
+VpNewRbClass(size_t mx, char const *str, VALUE klass);
VP_EXPORT Real *VpCreateRbObject(size_t mx,const char *str);