diff --git a/configure.ac b/configure.ac
index 62afc6e2..d88d7181 100644
--- a/configure.ac
+++ b/configure.ac
@@ -133,7 +133,7 @@ esac
 
 AX_CODE_COVERAGE()
 
-AX_CHECK_COMPILE_FLAG([-Wunknown-warning-option], [have_unknown_warning_option="yes"], [have_unknown_warning_option="no"], [-Werror])
+AX_CHECK_COMPILE_FLAG([-Wunknown-warning-option], [have_unknown_warning_option="yes"], [have_unknown_warning_option="no"])
 AM_CONDITIONAL([HAVE_UNKNOWN_WARNING_OPTION], [test "${have_unknown_warning_option}" = "yes"])
 
 AC_ARG_ENABLE(