diff --git a/FEXCore/include/FEXCore/Utils/WritePriorityMutex.h b/FEXCore/include/FEXCore/Utils/WritePriorityMutex.h
index 84742f86a..bf1bd2bbc 100644
--- a/FEXCore/include/FEXCore/Utils/WritePriorityMutex.h
+++ b/FEXCore/include/FEXCore/Utils/WritePriorityMutex.h
@@ -2,6 +2,7 @@
 #pragma once
 #include <atomic>
 #include <cstdint>
+#include <limits.h>
 
 #if !defined(_WIN32)
 #include <linux/futex.h> /* Definition of FUTEX_* constants */
diff --git a/Source/Tools/CommonTools/PortabilityInfo.h b/Source/Tools/CommonTools/PortabilityInfo.h
index 320096856..5e338174f 100644
--- a/Source/Tools/CommonTools/PortabilityInfo.h
+++ b/Source/Tools/CommonTools/PortabilityInfo.h
@@ -1,5 +1,7 @@
 // SPDX-License-Identifier: MIT
 #pragma once
+#include <limits.h>
+
 #include "Common/Config.h"
 
 namespace FEX {