diff --git a/os/src/userspace/Makefile b/os/src/userspace/Makefile
index 123976d..2fb39d7 100644
--- a/os/src/userspace/Makefile
+++ b/os/src/userspace/Makefile
@@ -5,7 +5,7 @@
 CC = $(CROSS_COMPILE)gcc
 CXX = $(CROSS_COMPILE)g++
 CFLAGS = -Wall -O2
-CXXFLAGS = -std=c++17 -Wall -O2
+CXXFLAGS = -std=c++17 -Wall -Wno-psabi -O2
 
 .PHONY: all
 all: puzzlecmd