diff --git a/components/axp192/axp192.cpp b/components/axp192/axp192.cpp
index a91df16..3e712ea 100644
--- a/components/axp192/axp192.cpp
+++ b/components/axp192/axp192.cpp
@@ -54,7 +54,7 @@ void AXP192Component::begin(bool disableLDO2, bool disableLDO3, bool disableRTC,
     Write1Byte(0x33, 0xc0);
 
     // Depending on configuration enable LDO2, LDO3, DCDC1, DCDC3.
-    byte buf = (Read8bit(0x12) & 0xef) | 0x4D;
+    uint8_t buf = (Read8bit(0x12) & 0xef) | 0x4D;
     if(disableLDO3) buf &= ~(1<<3);
     if(disableLDO2) buf &= ~(1<<2);
     if(disableDCDC3) buf &= ~(1<<1);