1 files changed, 4 insertions, 4 deletions
diff --git a/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c b/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c
index c3844b6d2..a7b320ade 100644
--- a/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c
+++ b/mrbgems/mruby-bin-debugger/tools/mrdb/apistring.c
@@ -9,7 +9,7 @@
 static size_t
 mrb_debug_strnlen(const char *s, size_t maxlen)
 {
-  const char *p = memchr(s, '\0', maxlen);
+  const char *p = (const char*)memchr(s, '\0', maxlen);
   return p != NULL ? (size_t)(p - s) : maxlen;
 }
 
@@ -17,7 +17,7 @@ char*
 mrdb_strndup(mrb_state *mrb, const char *s, size_t size)
 {
   size_t l = mrb_debug_strnlen(s, size);
-  char *d = mrb_malloc_simple(mrb, l + 1);
+  char *d = (char*)mrb_malloc_simple(mrb, l + 1);
   if (d != NULL) {
     memcpy(d, s, l);
     d[l] = '\0';
@@ -29,6 +29,6 @@ char*
 mrdb_strdup(mrb_state *mrb, const char *s)
 {
   size_t z = strlen(s) + 1;
-  char *d = mrb_malloc_simple(mrb, z);
-  return d != NULL ? memcpy(d, s, z) : NULL;
+  char *d = (char*)mrb_malloc_simple(mrb, z);
+  return d != NULL ? (char*)memcpy(d, s, z) : NULL;
 }