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-rw-r--r--generic/tclInt.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/generic/tclInt.h b/generic/tclInt.h
index 1dab0cb..6870f61 100644
--- a/generic/tclInt.h
+++ b/generic/tclInt.h
@@ -48,7 +48,9 @@
#else
#include <string.h>
#endif
-#ifdef STDC_HEADERS
+#if defined(_WIN32)
+#include <crtdefs.h>
+#elif defined(STDC_HEADERS)
#include <stddef.h>
#else
typedef int ptrdiff_t;