diff --git a/hyper.h b/hyper.h
index 7cf5143f..e31c540c 100644
--- a/hyper.h
+++ b/hyper.h
@@ -120,7 +120,7 @@ void addMessage(string s, char spamtype = 0);
 #define S3 cginf.vertex
 #define hyperbolic_37 (S7 == 7 && S3 == 3 && !bt::in() && !arcm::in())
 #define hyperbolic_not37 ((S7 > 7 || S3 > 3 || bt::in() || arcm::in()) && hyperbolic)
-#define weirdhyperbolic ((S7 > 7 || S3 > 3 || !STDVAR || bt::in() || arcm::in()) && hyperbolic)
+#define weirdhyperbolic ((S7 > 7 || S3 > 3 || !STDVAR || bt::in() || arcm::in() || arb::in()) && hyperbolic)
 #define stdhyperbolic (S7 == 7 && S3 == 3 && STDVAR && !bt::in() && !arcm::in())
 
 #define cgflags cginf.flags