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-rw-r--r--src/string.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/string.c b/src/string.c
index 6d2799270..92a34e70f 100644
--- a/src/string.c
+++ b/src/string.c
@@ -302,7 +302,7 @@ mrb_gc_free_str(mrb_state *mrb, struct RString *str)
/* no code */;
else if (RSTR_SHARED_P(str))
str_decref(mrb, str->as.heap.aux.shared);
- else if (RSTR_NOFREE_P(str) == 0)
+ else if (!RSTR_NOFREE_P(str))
mrb_free(mrb, str->as.heap.ptr);
}