--- a/configure.ac
+++ b/configure.ac
@@ -29,32 +29,6 @@ dnl automake variables we want in pkg-config
 pkglibexecdir=$libexecdir/$PACKAGE
 AC_SUBST(pkglibexecdir)
 
-AS_IF([echo "$CFLAGS" | grep -q -E -e '-Werror($| )'], [], [
-CC_CHECK_FLAGS_APPEND([WARN_CFLAGS], [CFLAGS], [\
-  -pipe \
-  -Wall \
-  -Werror=shadow \
-  -Werror=empty-body \
-  -Werror=strict-prototypes \
-  -Werror=missing-prototypes \
-  -Werror=implicit-function-declaration \
-  "-Werror=format=2 -Werror=format-security -Werror=format-nonliteral" \
-  -Werror=pointer-arith -Werror=init-self \
-  -Werror=missing-declarations \
-  -Werror=return-type \
-  -Werror=switch \
-  -Werror=overflow \
-  -Werror=int-conversion \
-  -Werror=parentheses \
-  -Werror=undef \
-  -Werror=incompatible-pointer-types \
-  -Werror=misleading-indentation \
-  -Werror=missing-include-dirs  \
-  -Wstrict-aliasing=2 \
-  -Werror=unused-result \
-])])
-AC_SUBST(WARN_CFLAGS)
-
 AC_ARG_ENABLE(sanitizers,
               AS_HELP_STRING([--enable-sanitizers],
                              [Enable ASAN and UBSAN (default: no)]),,