diff --git a/configure.ac b/configure.ac
index 076f52c..97b954a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,13 +60,6 @@ XORG_DRIVER_CHECK_EXT(RENDER, renderproto)
 # Obtain compiler/linker options for the driver dependencies
 PKG_CHECK_MODULES(XORG, [xorg-server >= 1.18 xproto fontsproto $REQUIRED_MODULES])
 
-# Checks for libraries.
-
-# Checks for library functions
-# We don't use strlcat, strlcpy, or timingsafe_memcmp, but check to quiet
-# -Wredundant-decls warning from xorg/os.h which will otherwise redefine them.
-AC_CHECK_FUNCS([strlcat strlcpy timingsafe_memcmp])
-
 AC_SUBST([moduledir])
 
 DRIVER_NAME=suncg3