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-rw-r--r--main/mergesort.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/main/mergesort.c b/main/mergesort.c
index e7db8ec98f..0cb1029126 100644
--- a/main/mergesort.c
+++ b/main/mergesort.c
@@ -58,6 +58,10 @@ static char sccsid[] = "@(#)merge.c 8.2 (Berkeley) 2/14/94";
#include <stdlib.h>
#include <string.h>
+#if (WINNT|WIN32)
+#include <winsock.h> /* Includes definition for u_char */
+#endif
+
static void setup (u_char *, u_char *, size_t, size_t, int (*)());
static void insertionsort (u_char *, size_t, size_t, int (*)());