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-rw-r--r--src/tool_doswin.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/tool_doswin.c b/src/tool_doswin.c
index c1ba48ea9..4fae91d32 100644
--- a/src/tool_doswin.c
+++ b/src/tool_doswin.c
@@ -81,6 +81,8 @@ __pragma(warning(pop))
# define _use_lfn(f) ALWAYS_TRUE /* long file names always available */
#elif !defined(__DJGPP__) || (__DJGPP__ < 2) /* DJGPP 2.0 has _use_lfn() */
# define _use_lfn(f) ALWAYS_FALSE /* long file names never available */
+#elif defined(__DJGPP__)
+# include <fcntl.h> /* _use_lfn(f) prototype */
#endif
static const char *msdosify (const char *file_name);