diff --git a/src/FruDevice.cpp b/src/FruDevice.cpp
index fd45775..1a389e5 100644
--- a/src/FruDevice.cpp
+++ b/src/FruDevice.cpp
@@ -179,7 +179,7 @@
             if (ioctl(file, I2C_SLAVE_FORCE, ii) < 0)
             {
                 std::cerr << "device at bus " << bus << " register " << ii
-                          << "busy\n";
+                          << " busy\n";
                 continue;
             }
             // probe