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-rw-r--r--win/tclWinLoad.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/win/tclWinLoad.c b/win/tclWinLoad.c
index 0f664f0..e262595 100644
--- a/win/tclWinLoad.c
+++ b/win/tclWinLoad.c
@@ -20,7 +20,9 @@
*/
static WCHAR *dllDirectoryName = NULL;
+#if TCL_THREADS
static Tcl_Mutex dllDirectoryNameMutex;
+#endif
/*
* Static functions defined within this file.