diff --git a/lang/funcs/encoding.go b/lang/funcs/encoding.go
index af93f08dc..d9a0bbb31 100644
--- a/lang/funcs/encoding.go
+++ b/lang/funcs/encoding.go
@@ -29,8 +29,8 @@ var Base64DecodeFunc = function.New(&function.Spec{
 			return cty.UnknownVal(cty.String), fmt.Errorf("failed to decode base64 data '%s'", s)
 		}
 		if !utf8.Valid([]byte(sDec)) {
-			log.Printf("[DEBUG] the result of decoding the the provided string is not valid UTF-8: %s", sDec)
-			return cty.UnknownVal(cty.String), fmt.Errorf("the result of decoding the the provided string is not valid UTF-8")
+			log.Printf("[DEBUG] the result of decoding the provided string is not valid UTF-8: %s", sDec)
+			return cty.UnknownVal(cty.String), fmt.Errorf("the result of decoding the provided string is not valid UTF-8")
 		}
 		return cty.StringVal(string(sDec)), nil
 	},