diff --git a/hclparse/parser.go b/hclparse/parser.go
index c9b843d0..38c9e9ec 100644
--- a/hclparse/parser.go
+++ b/hclparse/parser.go
@@ -76,7 +76,7 @@ func (p *Parser) ParseHCLFile(filename string) (*hcl.File, hcl.Diagnostics) {
 			{
 				Severity: hcl.DiagError,
 				Summary:  "Failed to read file",
-				Detail:   fmt.Sprintf("The configuration file %q could not be read.", filename),
+				Detail:   fmt.Sprintf("The configuration file %#q could not be read: %s", filename, err),
 			},
 		}
 	}