diff --git a/lpc_aspeed.cpp b/lpc_aspeed.cpp
index 7f111f2..364aff5 100644
--- a/lpc_aspeed.cpp
+++ b/lpc_aspeed.cpp
@@ -140,10 +140,13 @@
 {
     /* Open the file to map. */
     mappedFd = sys->open(lpcControlPath.c_str(), O_RDONLY | O_SYNC);
+    if (mappedFd == -1)
+    {
+        std::fprintf(stderr, "ipmiflash: unable to open %s\n",
+                     lpcControlPath.c_str());
+        return false;
+    }
 
-    /* TODO: The offset to use is the address we use for the map - the base
-     * address of the memory region we reserved in the device-tree.
-     */
     mappedRegion = reinterpret_cast<uint8_t*>(
         sys->mmap(0, regionSize, PROT_READ, MAP_SHARED, mappedFd, 0));