diff --git a/thin_dump.cc b/thin_dump.cc
index 93552b1..6577503 100644
--- a/thin_dump.cc
+++ b/thin_dump.cc
@@ -88,7 +88,7 @@ int main(int argc, char **argv)
 	}
 
 	if (filename.empty()) {
-		cerr << "No dump file name" << endl;
+		cerr << "No output file provided." << endl;
 		return 1;
 	}
 
diff --git a/thin_restore.cc b/thin_restore.cc
index 674ecb4..4fd5ec6 100644
--- a/thin_restore.cc
+++ b/thin_restore.cc
@@ -92,12 +92,12 @@ int main(int argc, char **argv)
 	}
 
         if (input.empty()) {
-		cerr << "No input file name" << endl;
+		cerr << "No input file provided." << endl;
 		return 1;
 	}
 
 	if (output.empty()) {
-		cerr << "No output file name" << endl;
+		cerr << "No output file provided." << endl;
 		return 1;
 	}