1 files changed, 6 insertions, 2 deletions
diff --git a/io.c b/io.c
index ae021f8a4b..0fd059714a 100644
--- a/io.c
+++ b/io.c
@@ -3461,10 +3461,14 @@ static void
 opt_i_set(val)
     VALUE val;
 {
+    if (!RTEST(val)) {
+	if (ruby_inplace_mode) free(ruby_inplace_mode);
+	ruby_inplace_mode = 0;
+	return;
+    }
+    StringValue(val);
     if (ruby_inplace_mode) free(ruby_inplace_mode);
     ruby_inplace_mode = 0;
-    if (!RTEST(val)) return;
-    StringValue(val);
     ruby_inplace_mode = strdup(RSTRING(val)->ptr);
 }