diff --git a/Sources/IfTag.swift b/Sources/IfTag.swift
index 9b80c2f..538ef70 100644
--- a/Sources/IfTag.swift
+++ b/Sources/IfTag.swift
@@ -63,6 +63,8 @@ public class IfNode : NodeType {
       truthy = !result.isEmpty
     } else if let result = result as? [String:Any] {
       truthy = !result.isEmpty
+    } else if let result = result as? Bool {
+      truthy = result
     } else if result != nil {
       truthy = true
     }