diff --git a/src/diffviewer/ydiff.c b/src/diffviewer/ydiff.c
index 9fc0233dd..64d207e73 100644
--- a/src/diffviewer/ydiff.c
+++ b/src/diffviewer/ydiff.c
@@ -3297,10 +3297,9 @@ dview_get_title (const Dlg_head * h, size_t len)
     return g_string_free (title, FALSE);
 }
 
-/*** public functions ****************************************************************************/
 /* --------------------------------------------------------------------------------------------- */
 
-int
+static int
 diff_view (const char *file1, const char *file2, const char *label1, const char *label2)
 {
     int error;
@@ -3339,6 +3338,7 @@ diff_view (const char *file1, const char *file2, const char *label1, const char
     return error == 0 ? 1 : 0;
 }
 
+/*** public functions ****************************************************************************/
 /* --------------------------------------------------------------------------------------------- */
 
 #define GET_FILE_AND_STAMP(n) \
diff --git a/src/diffviewer/ydiff.h b/src/diffviewer/ydiff.h
index 9749e7fcf..7c1d1b270 100644
--- a/src/diffviewer/ydiff.h
+++ b/src/diffviewer/ydiff.h
@@ -12,6 +12,5 @@
 /*** declarations of public functions ************************************************************/
 
 int dview_diff_cmd (const void *f0, const void *f1);
-int diff_view (const char *file1, const char *file2, const char *label1, const char *label2);
 
 #endif /* MC__DIFFVIEW_YDIFF_H */