diff --git a/lib/http.c b/lib/http.c
index 3aba7aaddc..73d13a6dc6 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -34,13 +34,6 @@
 
 #include <errno.h>
 
-
-#ifdef NEED_REENTRANT
-#define _REENTRANT /* Necessary to use in Solaris, since the silly guys at Sun
-                      made the localtime_r() prototype dependent on it (or
-                      _POSIX_C_SOURCE or _POSIX_PTHREAD_SEMANTICS). */
-#endif
-
 #if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
 #include <winsock.h>
 #include <time.h>
diff --git a/lib/if2ip.c b/lib/if2ip.c
index 01076c9a06..1e6a88f0d5 100644
--- a/lib/if2ip.c
+++ b/lib/if2ip.c
@@ -34,10 +34,6 @@
 
 #if ! defined(WIN32) && ! defined(__BEOS__) && !defined(__CYGWIN32__)
 
-#ifdef NEED_REENTRANT
-#define _REENTRANT
-#endif
-
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif