chang #if to #ifdef

diff --git a/ext/ftp/ftp.c b/ext/ftp/ftp.c
index 1b0eefa039a39173f49a118842c7154f18c86b67..aafdd1fecbfe4305df2b448714adadd2c7e1b74c 100644 (file)
--- a/ext/ftp/ftp.c
+++ b/ext/ftp/ftp.c
@@ -37,7 +37,7 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <stdlib.h>
-#if HAVE_UINSTD_H
+#ifdef HAVE_UINSTD_H
 #include <unistd.h>
 #endif
 #include <fcntl.h>