diff --git a/src/spec/expectations.cr b/src/spec/expectations.cr
index d46f5c234276..168facbfb42f 100644
--- a/src/spec/expectations.cr
+++ b/src/spec/expectations.cr
@@ -368,7 +368,7 @@ module Spec
 
     # Creates an `Expectation` that passes if actual is of type *type* (`is_a?`).
     macro be_a(type)
-      Spec::BeAExpectation({{type}}).new
+      ::Spec::BeAExpectation({{type}}).new
     end
 
     # Runs the block and passes if it raises an exception of type *klass* and the error message matches.