diff --git a/src/Targets/Microchip/AVR/AVR8/TargetDescription/TargetDescriptionFile.cpp b/src/Targets/Microchip/AVR/AVR8/TargetDescription/TargetDescriptionFile.cpp
index 32fae59a..f17496d2 100644
--- a/src/Targets/Microchip/AVR/AVR8/TargetDescription/TargetDescriptionFile.cpp
+++ b/src/Targets/Microchip/AVR/AVR8/TargetDescription/TargetDescriptionFile.cpp
@@ -23,7 +23,7 @@ TargetDescriptionFile::TargetDescriptionFile(
 ) {
     auto targetSignatureHex = targetSignature.toHex();
     auto mapping = TargetDescriptionFile::getTargetDescriptionMapping();
-    auto qTargetSignatureHex = QString::fromStdString(targetSignatureHex);
+    auto qTargetSignatureHex = QString::fromStdString(targetSignatureHex).toLower();
 
     if (mapping.contains(qTargetSignatureHex)) {
         // We have a match for the target signature.