diff --git a/bootstrap/ISBPL.java b/bootstrap/ISBPL.java
index 96c3ef4..8095163 100644
--- a/bootstrap/ISBPL.java
+++ b/bootstrap/ISBPL.java
@@ -1490,7 +1490,7 @@ class ISBPLObject {
     }
     
     public boolean isTruthy() {
-        return object != null && object != Integer.valueOf(0);
+        return object != null && object != Integer.valueOf(0) && object != Boolean.valueOf(false);
     }
     
     // This has heavy optimizations, please do not change unless necessary