diff --git a/configure.ac b/configure.ac
index 8cc4e1c08..fc8ef4ecb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -802,7 +802,7 @@ case "$target_os" in
 	;;
 esac
 if test "$strictness" = "yes" ; then
-	STRICT_OPTIONS="$STRICT_OPTIONS -Werror -Wextra -Wno-unused-parameter -Wno-error=deprecated-declarations -Wno-error=strict-prototypes -Wno-missing-field-initializers"
+	STRICT_OPTIONS="$STRICT_OPTIONS -Werror -Wextra -Wno-unused-parameter -Wno-error=deprecated-declarations -Wno-missing-field-initializers"
 	CFLAGS="$CFLAGS -fno-strict-aliasing"
 fi
 
diff --git a/tester/message_tester.c b/tester/message_tester.c
index e0a93d548..a00e79710 100644
--- a/tester/message_tester.c
+++ b/tester/message_tester.c
@@ -32,9 +32,6 @@
 #endif
 #ifdef _MSC_VER
 #pragma warning(disable : 4996)
-#else
-#pragma GCC diagnostic ignored "-Wstrict-prototypes"
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 #endif
 
 
@@ -869,11 +866,11 @@ end:
 	linphone_core_manager_destroy(pauline);
 }
 
-static void is_composing_notification() {
+static void is_composing_notification(void) {
 	_is_composing_notification(FALSE);
 }
 
-static void is_composing_notification_with_lime() {
+static void is_composing_notification_with_lime(void) {
 	_is_composing_notification(TRUE);
 }
 
@@ -2063,7 +2060,7 @@ test_t message_tests[] = {
 	TEST_ONE_TAG("Real Time Text offer answer with different payload numbers (sender side)", real_time_text_message_different_text_codecs_payload_numbers_sender_side, "RTT"),
 	TEST_ONE_TAG("Real Time Text offer answer with different payload numbers (receiver side)", real_time_text_message_different_text_codecs_payload_numbers_receiver_side, "RTT"),
 	TEST_ONE_TAG("Real Time Text copy paste", real_time_text_copy_paste, "RTT"),
-	TEST_NO_TAG("IM Encryption Engine custom headers", chat_message_custom_headers),
+	TEST_NO_TAG("IM Encryption Engine custom headers", chat_message_custom_headers)
 };
 
 test_suite_t message_test_suite = {