diff --git a/src/NVMeSensorMain.cpp b/src/NVMeSensorMain.cpp
index 7348733..d5a8c6b 100644
--- a/src/NVMeSensorMain.cpp
+++ b/src/NVMeSensorMain.cpp
@@ -110,7 +110,7 @@
                 {
                     std::string rootName =
                         std::filesystem::read_symlink(muxPath).filename();
-                    size_t dash = rootName.find("-");
+                    size_t dash = rootName.find('-');
                     if (dash == std::string::npos)
                     {
                         std::cerr << "Error finding root bus for " << rootName