diff --git a/wsd/COOLWSD.cpp b/wsd/COOLWSD.cpp
index 3edba4ba51..bf302f5210 100644
--- a/wsd/COOLWSD.cpp
+++ b/wsd/COOLWSD.cpp
@@ -16,7 +16,9 @@
 #if ENABLE_FEATURE_LOCK
 #include "CommandControl.hpp"
 #endif
-#include "HostUtil.hpp"
+#if !MOBILEAPP
+#include <HostUtil.hpp>
+#endif // !MOBILEAPP
 
 /* Default host used in the start test URI */
 #define COOLWSD_TEST_HOST "localhost"
diff --git a/wsd/ClientRequestDispatcher.cpp b/wsd/ClientRequestDispatcher.cpp
index e19e70cda9..fdd005c451 100644
--- a/wsd/ClientRequestDispatcher.cpp
+++ b/wsd/ClientRequestDispatcher.cpp
@@ -25,7 +25,9 @@
 #include <DocumentBroker.hpp>
 #include <Exceptions.hpp>
 #include <FileServer.hpp>
+#if !MOBILEAPP
 #include <HostUtil.hpp>
+#endif // !MOBILEAPP
 #include <RequestDetails.hpp>
 #include <ProxyRequestHandler.hpp>
 #include <WopiProxy.hpp>
@@ -382,8 +384,6 @@ getConvertToBrokerImplementation(const std::string& requestType, const std::stri
     return nullptr;
 }
 
-#endif // !MOBILEAPP
-
 bool ClientRequestDispatcher::allowPostFrom(const std::string& address)
 {
     static bool init = false;
@@ -465,6 +465,8 @@ bool ClientRequestDispatcher::allowConvertTo(const std::string& address,
     return allow;
 }
 
+#endif // !MOBILEAPP
+
 void ClientRequestDispatcher::onConnect(const std::shared_ptr<StreamSocket>& socket)
 {
     _id = COOLWSD::GetConnectionId();
@@ -1884,10 +1886,17 @@ ClientRequestDispatcher::getCapabilitiesJson(const Poco::Net::HTTPRequest& reque
 
     // Can the convert-to be used?
     Poco::JSON::Object::Ptr convert_to = new Poco::JSON::Object;
+#if !MOBILEAPP
     Poco::Dynamic::Var available = allowConvertTo(socket->clientAddress(), request);
     convert_to->set("available", available);
     if (available)
         convert_to->set("endpoint", "/cool/convert-to");
+#else
+    // convert-to is not supported on mobile apps as it requires wopi.
+    (void)request;
+    Poco::Dynamic::Var available = false;
+    convert_to->set("available", available);
+#endif // MOBILEAPP
 
     Poco::JSON::Object::Ptr capabilities = new Poco::JSON::Object;
     capabilities->set("convert-to", convert_to);
diff --git a/wsd/ClientRequestDispatcher.hpp b/wsd/ClientRequestDispatcher.hpp
index 34964463d7..90c750764d 100644
--- a/wsd/ClientRequestDispatcher.hpp
+++ b/wsd/ClientRequestDispatcher.hpp
@@ -31,11 +31,6 @@ public:
         StaticFileContentCache["discovery.xml"] = getDiscoveryXML();
     }
 
-    /// Does this address feature in the allowed hosts list.
-    static bool allowPostFrom(const std::string& address);
-
-    static bool allowConvertTo(const std::string& address, const Poco::Net::HTTPRequest& request);
-
 private:
     /// Set the socket associated with this ResponseClient.
     void onConnect(const std::shared_ptr<StreamSocket>& socket) override;
@@ -52,6 +47,11 @@ private:
     void performWrites(std::size_t /*capacity*/) override {}
 
 #if !MOBILEAPP
+    /// Does this address feature in the allowed hosts list.
+    static bool allowPostFrom(const std::string& address);
+
+    static bool allowConvertTo(const std::string& address, const Poco::Net::HTTPRequest& request);
+
     void handleRootRequest(const RequestDetails& requestDetails,
                            const std::shared_ptr<StreamSocket>& socket);
 
diff --git a/wsd/HostUtil.cpp b/wsd/HostUtil.cpp
index dedc87a847..9bb78fed53 100644
--- a/wsd/HostUtil.cpp
+++ b/wsd/HostUtil.cpp
@@ -9,7 +9,10 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-#include "config.h"
+#include <config.h>
+
+// HostUtil is only used in non-mobile apps.
+#if !MOBILEAPP
 
 #include "HostUtil.hpp"
 #include <common/ConfigUtil.hpp>
@@ -230,4 +233,6 @@ void HostUtil::setFirstHost(const Poco::URI& uri)
     }
 }
 
+#endif // !MOBILEAPP
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/wsd/HostUtil.hpp b/wsd/HostUtil.hpp
index 2ef64faf57..aceb215d7a 100644
--- a/wsd/HostUtil.hpp
+++ b/wsd/HostUtil.hpp
@@ -11,6 +11,9 @@
 
 #pragma once
 
+// HostUtil is only used in non-mobile apps.
+#if !MOBILEAPP
+
 #include <Util.hpp>
 #include <Poco/URI.h>
 #include <Poco/Util/Application.h>
@@ -56,5 +59,6 @@ private:
     /// add host to WopiHosts
     static void addWopiHost(const std::string& host, bool allow);
 };
+#endif // !MOBILEAPP
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */