diff --git a/src/lib/asiolink/tcp_socket.h b/src/lib/asiolink/tcp_socket.h
index c8876c89ec..2505d7b019 100644
--- a/src/lib/asiolink/tcp_socket.h
+++ b/src/lib/asiolink/tcp_socket.h
@@ -276,7 +276,7 @@ TCPSocket<C>::asyncSend(const void* data, size_t length,
             // ... and send it
             socket_.async_send(asio::buffer(send_buffer_->getData(),
                                send_buffer_->getLength()), callback);
-        } catch (boost::numeric::bad_numeric_cast& e) {
+        } catch (boost::numeric::bad_numeric_cast&) {
             isc_throw(BufferTooLarge,
                       "attempt to send buffer larger than 64kB");
         }
diff --git a/src/lib/bench/benchmark_util.cc b/src/lib/bench/benchmark_util.cc
index c67a851eb3..9cf3b264b3 100644
--- a/src/lib/bench/benchmark_util.cc
+++ b/src/lib/bench/benchmark_util.cc
@@ -103,7 +103,7 @@ loadQueryData(istream& input, BenchQueries& queries, const RRClass& qclass,
                 static_cast<const unsigned char*>(buffer.getData()) +
                 buffer.getLength());
             queries.push_back(query_data);
-        } catch (const Exception& error) {
+        } catch (const Exception&) {
             if (strict) {
                 isc_throw(BenchMarkError,
                           "failed to parse/create query around line " <<
diff --git a/src/lib/cc/data.cc b/src/lib/cc/data.cc
index 3ebc4f80cc..9fc341da10 100644
--- a/src/lib/cc/data.cc
+++ b/src/lib/cc/data.cc
@@ -742,7 +742,7 @@ MapElement::find(const std::string& id, ConstElementPtr t) const {
             t = p;
             return (true);
         }
-    } catch (const TypeError& e) {
+    } catch (const TypeError&) {
         // ignore
     }
     return (false);
diff --git a/src/lib/dhcp/libdhcp.cc b/src/lib/dhcp/libdhcp.cc
index f84e495454..dd86de9e66 100644
--- a/src/lib/dhcp/libdhcp.cc
+++ b/src/lib/dhcp/libdhcp.cc
@@ -139,7 +139,7 @@ LibDHCP::packOptions6(boost::shared_array<uint8_t> data,
             offset = it->second->pack(data, data_len, offset);
         }
     }
-    catch (const Exception& e) {
+    catch (const Exception&) {
         cout << "Packet build failed (Option build failed)." << endl;
         throw;
     }
diff --git a/src/lib/python/isc/log/log.cc b/src/lib/python/isc/log/log.cc
index 2e4a28fc81..ed053984d2 100644
--- a/src/lib/python/isc/log/log.cc
+++ b/src/lib/python/isc/log/log.cc
@@ -237,10 +237,10 @@ logConfigUpdate(PyObject*, PyObject* args) {
     } catch (const isc::data::JSONError& je) {
         std::string error_msg = std::string("JSON format error: ") + je.what();
         PyErr_SetString(PyExc_TypeError, error_msg.c_str());
-    } catch (const isc::data::TypeError& de) {
+    } catch (const isc::data::TypeError&) {
         PyErr_SetString(PyExc_TypeError, "argument 1 of log_config_update "
                                          "is not a map of config data");
-    } catch (const isc::config::ModuleSpecError& mse) {
+    } catch (const isc::config::ModuleSpecError&) {
         PyErr_SetString(PyExc_TypeError, "argument 2 of log_config_update "
                                          "is not a correct module specification");
     } catch (const std::exception& e) {
diff --git a/src/lib/server_common/portconfig.cc b/src/lib/server_common/portconfig.cc
index 379a0a17c4..fba8e1a91d 100644
--- a/src/lib/server_common/portconfig.cc
+++ b/src/lib/server_common/portconfig.cc
@@ -59,7 +59,7 @@ parseAddresses(isc::data::ConstElementPtr addresses,
                     result.push_back(AddressPair(addr->stringValue(),
                         port->intValue()));
                 }
-                catch (const TypeError &e) { // Better error message
+                catch (const TypeError&) { // Better error message
                     LOG_ERROR(logger, SRVCOMM_ADDRESS_TYPE).
                         arg(addrPair->str());
                     isc_throw(TypeError,
diff --git a/src/lib/util/strutil.h b/src/lib/util/strutil.h
index 021c236b5e..0dbbe96b04 100644
--- a/src/lib/util/strutil.h
+++ b/src/lib/util/strutil.h
@@ -191,7 +191,7 @@ tokenToNum(const std::string& num_token) {
     NumType num;
     try {
         num = boost::lexical_cast<NumType>(num_token);
-    } catch (const boost::bad_lexical_cast& ex) {
+    } catch (const boost::bad_lexical_cast&) {
         isc_throw(StringTokenError, "Invalid SRV numeric parameter: " <<
                   num_token);
     }