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-rw-r--r--compat/os2threads.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/compat/os2threads.h b/compat/os2threads.h
index eec6f40ae7..a061eaa63d 100644
--- a/compat/os2threads.h
+++ b/compat/os2threads.h
@@ -27,6 +27,7 @@
#define COMPAT_OS2THREADS_H
#define INCL_DOS
+#define INCL_DOSERRORS
#include <os2.h>
#undef __STRICT_ANSI__ /* for _beginthread() */