diff --git a/toolchain/gdb/Makefile b/toolchain/gdb/Makefile
index 9b9ee5a9d8..ad0c843f75 100644
--- a/toolchain/gdb/Makefile
+++ b/toolchain/gdb/Makefile
@@ -56,6 +56,8 @@ else
   HOST_CONFIGURE_ARGS+= --without-python
 endif
 
+HOST_CFLAGS += -std=gnu17
+
 define Host/Install
 	mkdir -p $(TOOLCHAIN_DIR)/bin
 	$(INSTALL_BIN) $(HOST_BUILD_DIR)/gdb/gdb $(TOOLCHAIN_DIR)/bin/$(TARGET_CROSS)gdb