diff --git a/internal/terraform/node_module_variable.go b/internal/terraform/node_module_variable.go
index e28ca415a3..af80c1d485 100644
--- a/internal/terraform/node_module_variable.go
+++ b/internal/terraform/node_module_variable.go
@@ -260,7 +260,7 @@ func (n *nodeModuleVariable) evalModuleCallArgument(ctx EvalContext, validateOnl
 		diags = diags.Append(&hcl.Diagnostic{
 			Severity: hcl.DiagError,
 			Summary:  `Invalid variable value`,
-			Detail:   fmt.Sprintf(`The resolved value of variable %q cannot be null.`, n.Addr),
+			Detail:   fmt.Sprintf(`The variable %q is required, but the given value resolved to null`, n.Addr),
 			Subject:  &n.Config.DeclRange,
 		})
 		// Stub out our return value so that the semantic checker doesn't