diff --git a/relations/src/gr1cs/trace.rs b/relations/src/gr1cs/trace.rs
index a09f8e85f..abb87b0d8 100644
--- a/relations/src/gr1cs/trace.rs
+++ b/relations/src/gr1cs/trace.rs
@@ -307,7 +307,7 @@ impl fmt::Display for ConstraintTrace {
                     f,
                     "{:>4}: {}::{}",
                     span,
-                    metadata.module_path().unwrap(),
+                    metadata.module_path().unwrap_or(metadata.target()),
                     metadata.name()
                 ),
                 err