diff --git a/configure.ac b/configure.ac
index a301c21cf01..45c5f623f69 100644
--- a/configure.ac
+++ b/configure.ac
@@ -553,7 +553,6 @@ if test "`uname -s 2>/dev/null`" != "QNX"; then
 fi
 
 dnl Checks for types.
-AC_TYPE_SIZE_T
 AC_TYPE_UID_T
 
 dnl Checks for sockaddr_storage and sockaddr.sa_len.