diff --git a/configure.ac b/configure.ac
index d09968b8..4b76b00c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -223,7 +223,6 @@ fi
 AC_MSG_RESULT($XLIB_LOADABLE_XCURSOR)
 
 # Checks for header files.
-AC_HEADER_STDC
 AC_CHECK_HEADERS([sys/select.h])
 
 # Checks for typedefs, structures, and compiler characteristics.