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-rw-r--r--ext/psych/yaml/yaml_private.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/psych/yaml/yaml_private.h b/ext/psych/yaml/yaml_private.h
index 6c674de..266a6bd 100644
--- a/ext/psych/yaml/yaml_private.h
+++ b/ext/psych/yaml/yaml_private.h
@@ -2,7 +2,7 @@
#include RUBY_EXTCONF_H
#endif
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
#include "config.h"
#endif