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-rw-r--r--main/mergesort.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/main/mergesort.c b/main/mergesort.c
index d0461a58c9..36c4dcab7f 100644
--- a/main/mergesort.c
+++ b/main/mergesort.c
@@ -58,6 +58,8 @@ static char sccsid[] = "@(#)merge.c 8.2 (Berkeley) 2/14/94";
#include <stdlib.h>
#include <string.h>
+#include "php.h"
+
#if (WINNT|WIN32)
#include <winsock.h> /* Includes definition for u_char */
#endif