diff --git a/source/global/version.bas b/source/global/version.bas
index dd50eb3f1..0fad240a8 100644
--- a/source/global/version.bas
+++ b/source/global/version.bas
@@ -1,2 +1,7 @@
 DIM SHARED Version AS STRING
+DIM SHARED BuildNum AS STRING
 Version$ = "1.000"
+'BuildNum format is YYYYMMDD/id, where id is a ever-increasing
+'integer. If you make a change, update the date and increase the id!
+BuildNum$ = "20160318/1"
+
diff --git a/source/ide/ide_methods.bas b/source/ide/ide_methods.bas
index 86078d2e1..1513774da 100644
--- a/source/ide/ide_methods.bas
+++ b/source/ide/ide_methods.bas
@@ -3785,7 +3785,7 @@ DO
 
         IF menu$(m, s) = "#About..." THEN
             PCOPY 2, 0
-            idemessagebox "About", "QB64 Version " + Version$
+            idemessagebox "About", "QB64 Version " + Version$ + " (" + BuildNum$ + ")"
             PCOPY 3, 0: SCREEN , , 3, 0: idewait4mous: idewait4alt
             GOTO ideloop
         END IF