diff --git a/src/LCDDisplay.cpp b/src/LCDDisplay.cpp
index 78bed28..46fcf94 100644
--- a/src/LCDDisplay.cpp
+++ b/src/LCDDisplay.cpp
@@ -85,9 +85,8 @@ void LCDDisplay::setCursor(uint8_t row, uint8_t col) {
 }
 
 void LCDDisplay::setCustomChar(uint8_t index, std::array<uint8_t, 8> cchar) {
-    uint8_t cmdbuf[11] = {254, 78, index, 0, 0, 0, 0, 0, 0, 0, 0};
-    for (uint8_t i = 0; i < 8; i++)
-        cmdbuf[i + 3] = cchar[i];
+    uint8_t cmdbuf[] = {254, 78, index, 0, 0, 0, 0, 0, 0, 0, 0};
+    std::memcpy(&cmdbuf[3], &cchar, cchar.size());
     ::write(_lcd, &cmdbuf, 11);
 }