diff --git a/http.c b/http.c
index eed548e5..710c7522 100644
--- a/http.c
+++ b/http.c
@@ -28,6 +28,7 @@
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
+#define _REENTRANT
 
 #ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>