diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 3d435955..d3160f04 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -77,6 +77,14 @@ target_include_directories(paho-cpp-objs
         src
 )
 
+# --- Warnings ---
+
+# Maybe set '-Werror' for Release builds?
+target_compile_options(paho-cpp-objs PRIVATE
+  $<$<CXX_COMPILER_ID:MSVC>:/W3>
+  $<$<CXX_COMPILER_ID:Clang>:-Wall -Wextra -Wdocumentation>
+  $<$<NOT:$<CXX_COMPILER_ID:MSVC,Clang>>:-Wall -Wextra>
+)
 
 ## --- Build the shared library, if requested ---
 
diff --git a/src/mqtt/client.h b/src/mqtt/client.h
index 6900aed6..7b7d19c1 100644
--- a/src/mqtt/client.h
+++ b/src/mqtt/client.h
@@ -231,7 +231,7 @@ class client : private callback
 	 */
 	virtual topic get_topic(const string& top, int qos=message::DFLT_QOS,
 							bool retained=message::DFLT_RETAINED) {
-		return topic(cli_, top);
+		return topic(cli_, top, qos, retained);
 	}
 	/**
 	 * Determines if this client is currently connected to the server.
diff --git a/src/mqtt/server_response.h b/src/mqtt/server_response.h
index a1118390..a97f3bdf 100644
--- a/src/mqtt/server_response.h
+++ b/src/mqtt/server_response.h
@@ -190,7 +190,7 @@ class unsubscribe_response : public server_response
 		}
 	}
 
-	unsubscribe_response(MQTTAsync_successData* rsp) {}
+	unsubscribe_response(MQTTAsync_successData* /*rsp*/) {}
 
 public:
 	/**