diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index b3521f4be8..994eb9c522 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -1044,6 +1044,12 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
             if test "$curl_cv_native_windows" = "yes"; then
               tmp_CFLAGS="$tmp_CFLAGS -Wno-pedantic-ms-format"
             fi
+            case $host_os in
+              cygwin*)
+                dnl Silence warning in 'lt_fatal' libtool function
+                tmp_CFLAGS="$tmp_CFLAGS -Wno-suggest-attribute=noreturn"
+                ;;
+            esac
           fi
           #
           dnl Only gcc 4.6 or later