diff --git a/lib/scryptenc/scryptenc_print_error.c b/lib/scryptenc/scryptenc_print_error.c
index 2a3b5899..16d52cec 100644
--- a/lib/scryptenc/scryptenc_print_error.c
+++ b/lib/scryptenc/scryptenc_print_error.c
@@ -70,5 +70,8 @@ scryptenc_print_error(int rc, const char * infilename,
 	case SCRYPT_EPARAM:
 		warn0("Error in explicit parameters");
 		break;
+	default:
+		warn0("Programmer error: unrecognized scrypt error");
+		break;
 	}
 }