diff --git a/src/FileStream.cpp b/src/FileStream.cpp
index 7268923..2266518 100644
--- a/src/FileStream.cpp
+++ b/src/FileStream.cpp
@@ -34,7 +34,7 @@
 // Local functions - platform-specific functions
 
 #ifndef STORMLIB_WINDOWS
-static DWORD nLastError = ERROR_SUCCESS;
+static thread_local DWORD nLastError = ERROR_SUCCESS;
 
 DWORD GetLastError()
 {