diff --git a/src/Navaids/fixlist.cxx b/src/Navaids/fixlist.cxx
index a45bfcf35..058efed17 100644
--- a/src/Navaids/fixlist.cxx
+++ b/src/Navaids/fixlist.cxx
@@ -121,7 +121,7 @@ void FixesLoader::loadFixes(const SGPath& path, std::size_t bytesReadSoFar,
     try {
       lat = std::stod(fields[0]);
       lon = std::stod(fields[1]);
-    } catch (const std::exception& e) {
+    } catch (const std::exception&) {
       SG_LOG(SG_NAVAID, SG_WARN, utf8path << ": malformed line #" <<
              lineNumber << ": error parsing coordinates: " << fields[0] <<
              " " << fields[1]);
diff --git a/src/Navaids/navdb.cxx b/src/Navaids/navdb.cxx
index 5c1869dc3..ad2998529 100644
--- a/src/Navaids/navdb.cxx
+++ b/src/Navaids/navdb.cxx
@@ -489,7 +489,7 @@ void NavLoader::loadNav(const SGPath& path, std::size_t bytesReadSoFar,
   try {
     vector<string> fields(simgear::strutils::split(line, 0, 1));
     version = std::stoul(fields[0]);
-  } catch (const std::logic_error& exc) {
+  } catch (const std::logic_error&) {
     std::string errMsg = utf8Path + ": unable to parse version from header";
     std::string strippedLine = simgear::strutils::stripTrailingNewlines(line);
     SG_LOG(SG_NAVAID, SG_ALERT, errMsg << ": " << strippedLine );