diff --git a/phosphor-power-supply/util.cpp b/phosphor-power-supply/util.cpp
index 5942ce7..73f86e0 100644
--- a/phosphor-power-supply/util.cpp
+++ b/phosphor-power-supply/util.cpp
@@ -16,6 +16,10 @@
     try
     {
         line = gpiod::find_line(namedGpio);
+        if (!line)
+        {
+            throw std::runtime_error("Line does not exist: " + namedGpio);
+        }
     }
     catch (std::exception& e)
     {