/* Get strdup declaration, if available. */
#include <string.h>
-#if !HAVE_DECL_STRDUP && !defined strdup
+#if defined HAVE_DECL_STRDUP && !HAVE_DECL_STRDUP && !defined strdup
/* Duplicate S, returning an identical malloc'd string. */
extern char *strdup (const char *s);
#endif