diff --git a/terraform/interpolate.go b/terraform/interpolate.go
index b9538fa2d..1c024e466 100644
--- a/terraform/interpolate.go
+++ b/terraform/interpolate.go
@@ -287,10 +287,10 @@ func (i *Interpolater) valueSimpleVar(
 	// relied on this for their template_file data sources. We should
 	// remove this at some point but there isn't any rush.
 	return fmt.Errorf(
-		"invalid variable syntax: %q. If this is part of inline `template` parameter\n" +
-			"then you must escape the interpolation with two dollar signs. For\n" +
-			"example: ${a} becomes $${a}." +
-			n)
+		"invalid variable syntax: %q. If this is part of inline `template` parameter\n"+
+			"then you must escape the interpolation with two dollar signs. For\n"+
+			"example: ${a} becomes $${a}.",
+		n)
 }
 
 func (i *Interpolater) valueUserVar(