1 files changed, 1 insertions, 1 deletions
diff --git a/marshal.c b/marshal.c
index cf84e5ed24..5c217a6879 100644
--- a/marshal.c
+++ b/marshal.c
@@ -14,7 +14,7 @@
 #include "rubyio.h"
 #include "st.h"
 
-#ifndef atof
+#if !defined(atof) && !defined(HAVE_STDLIB_H)
 double strtod();
 #endif