2 files changed, 2 insertions, 2 deletions
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 4fc22b51ce..9e22dc55e1 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -487,7 +487,7 @@ GetPositiveInt(VALUE v)
 }
 
 VP_EXPORT Real *
-VpNewRbClass(size_t mx, char *str, VALUE klass)
+VpNewRbClass(size_t mx, const char *str, VALUE klass)
 {
     Real *pv = VpAlloc(mx,str);
     pv->obj = TypedData_Wrap_Struct(klass, &BigDecimal_data_type, pv);
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);