diff --git a/src/FruDevice.cpp b/src/FruDevice.cpp
index 78d4635..baab14e 100644
--- a/src/FruDevice.cpp
+++ b/src/FruDevice.cpp
@@ -566,6 +566,7 @@
             std::cerr
                 << "Error: Could not get the adapter functionality matrix bus "
                 << bus << "\n";
+            close(file);
             continue;
         }
         if (!(funcs & I2C_FUNC_SMBUS_READ_BYTE) ||