diff --git a/src/LCDDisplay.cpp b/src/LCDDisplay.cpp
index e47494d..97f980f 100644
--- a/src/LCDDisplay.cpp
+++ b/src/LCDDisplay.cpp
@@ -40,7 +40,8 @@ int LCDDisplay::Init() {
 
     // disable underline and block cursor
     constexpr uint8_t cmdbuf[] = {254, 75, 254, 84};
-    ::write(lcd, &cmdbuf, sizeof(cmdbuf));
+    const ssize_t ret = ::write(lcd, &cmdbuf, sizeof(cmdbuf));
+    (void)ret;
 
     // clear display and set cursor home
     this->clear();