diff --git a/version.scad b/version.scad
index 60dda5d..75afa83 100644
--- a/version.scad
+++ b/version.scad
@@ -9,6 +9,10 @@
 //////////////////////////////////////////////////////////////////////
 
 
+_BOSL2_VERSION = is_undef(_BOSL2_STD) && (is_undef(BOSL2_NO_STD_WARNING) || !BOSL2_NO_STD_WARNING) ?
+       echo("Warning: version.scad included without std.scad; dependencies may be missing\nSet BOSL2_NO_STD_WARNING = true to mute this warning.") true : true;
+
+
 BOSL_VERSION = [2,0,716];