diff --git a/configure.ac b/configure.ac
index 01b61097..2823ecd7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -101,14 +101,8 @@ AM_WITH_DMALLOC
 #
 # Checks for header files.
 #
-AC_HEADER_STDC
 AC_CHECK_HEADERS([strings.h libgen.h unistd.h direct.h sys/stat.h])
 
-# REQUIRE standard C headers
-if test "$ac_cv_header_stdc" != yes; then
-	AC_MSG_ERROR([Standard (ANSI/ISO C89) header files are required.])
-fi
-
 #
 # Checks for typedefs, structures, and compiler characteristics.
 #