diff --git a/internal/util/errors.go b/internal/util/errors.go
index a73915ca27..257bca1d95 100644
--- a/internal/util/errors.go
+++ b/internal/util/errors.go
@@ -47,8 +47,6 @@ func NewAgentError(msg string, cause error) *AgentError {
 	return &AgentError{Msg: msg, Cause: cause}
 }
 
-var _ ToolboxError = &AgentError{}
-
 // ClientServerError returns 4XX/5XX error code
 type ClientServerError struct {
 	Msg   string