diff --git a/Misc/NEWS b/Misc/NEWS
index 74c881c..aaa702b 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
 Core and Builtins
 -----------------
 
+- Running Python with the -3 option now also warns about classic division
+  for ints and longs.
+
 - Issue #5260: Long integers now consume less memory:  average
   saving is 2 bytes per long on a 32-bit system and 6 bytes per long
   on a 64-bit system.
diff --git a/Modules/main.c b/Modules/main.c
index 6ed2cd7..1a58071 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -317,6 +317,8 @@
 
 		case '3':
 			Py_Py3kWarningFlag++;
+			if (!Py_DivisionWarningFlag)
+				Py_DivisionWarningFlag = 1;
 			break;
 
 		case 'Q':