diff --git a/configure.ac b/configure.ac
index cee9239..4be7c16 100644
--- a/configure.ac
+++ b/configure.ac
@@ -63,8 +63,6 @@ PKG_CHECK_MODULES(XORG, [xorg-server >= 1.0.99.901] xproto fontsproto $REQUIRED_
 
 # Checks for libraries.
 
-# Checks for header files.
-AC_HEADER_STDC
 
 DRIVER_NAME=dummy
 AC_SUBST([DRIVER_NAME])