diff --git a/Common/Arm64Emitter.cpp b/Common/Arm64Emitter.cpp
index 3113aa8ed5..7ba537d507 100644
--- a/Common/Arm64Emitter.cpp
+++ b/Common/Arm64Emitter.cpp
@@ -9,6 +9,7 @@
 #include <cinttypes>
 
 #include <stdlib.h>
+#include <string.h>
 
 #include "base/basictypes.h"
 
diff --git a/unittest/TestArm64Emitter.cpp b/unittest/TestArm64Emitter.cpp
index 6e59f71178..e4781a9905 100644
--- a/unittest/TestArm64Emitter.cpp
+++ b/unittest/TestArm64Emitter.cpp
@@ -4,6 +4,8 @@
 #include "Core/MIPS/MIPSVFPUUtils.h"
 #include "Core/Util/DisArm64.h"
 
+#include <string.h>
+
 #include "UnitTest.h"
 
 static bool CheckLast(Arm64Gen::ARM64XEmitter &emit, const char *comp) {
diff --git a/unittest/TestArmEmitter.cpp b/unittest/TestArmEmitter.cpp
index a149f47704..84b6bee9e0 100644
--- a/unittest/TestArmEmitter.cpp
+++ b/unittest/TestArmEmitter.cpp
@@ -5,6 +5,8 @@
 #include "Core/MIPS/MIPSVFPUUtils.h"
 #include "ext/disarm.h"
 
+#include <string.h>
+
 #include "UnitTest.h"
 
 static bool CheckLast(ArmGen::ARMXEmitter &emit, const char *comp) {