diff --git a/builtin/diff.c b/builtin/diff.c
index 9b6cdabe158b475d4a0b3233deb398ec3a583539..423011045a01ccd32ed29b22d1beefcf0198b2fc 100644
--- a/builtin/diff.c
+++ b/builtin/diff.c
@@ -22,6 +22,7 @@
 #include "setup.h"
 #include "oid-array.h"
 #include "tree.h"
+#include "advice.h"
 
 #define DIFF_NO_INDEX_EXPLICIT 1
 #define DIFF_NO_INDEX_IMPLICIT 2
@@ -372,6 +373,12 @@ static void symdiff_prepare(struct rev_info *rev, struct symdiff *sym)
 		usage(builtin_diff_usage);
 
 	if (!is_symdiff) {
+		if (lpos >= 0 || rpos >= 0)
+			advise(_("Support for \"git diff A..B\" is depreprecated\n"
+				 "and will be removed in a future Git version.\n"
+				 "\n"
+				 "Please use \"git diff A B\" to generate diffs.\n"));
+
 		bitmap_free(map);
 		sym->warn = 0;
 		sym->skip = NULL;