diff --git a/src/app/core/common.cc b/src/app/core/common.cc
index 36c217a2..47d8a916 100644
--- a/src/app/core/common.cc
+++ b/src/app/core/common.cc
@@ -26,11 +26,11 @@ std::string UppercaseHexByte(uint8_t byte, bool leading) {
   return result;
 }
 std::string UppercaseHexWord(uint16_t word) {
-  std::string result = absl::StrFormat("0x%04x", word);
+  std::string result = absl::StrFormat("0x%04X", word);
   return result;
 }
 std::string UppercaseHexLong(uint32_t dword) {
-  std::string result = absl::StrFormat("0x%08x", dword);
+  std::string result = absl::StrFormat("0x%06X", dword);
   return result;
 }