diff --git a/CMakeLists.txt b/CMakeLists.txt
index b85fabf52..d36898400 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -50,7 +50,12 @@ option(USE_MPG123 "use mpg123 + libsndfile for sound" ON)
 # OS X deployment
 option(OPENMW_OSX_DEPLOYMENT OFF)
 
-find_program(DPKG_PROGRAM dpkg DOC "dpkg program of Debian-based systems")
+if(UNIX AND NOT APPLE)
+    option(BUILD_WITH_DPKG "enable dpkg-based install for debian and debian derivatives" OFF)
+    if(BUILD_WITH_DPKG)
+        find_program(DPKG_PROGRAM dpkg DOC "dpkg program of Debian-based systems")
+    endif(BUILD_WITH_DPKG)
+endif(UNIX AND NOT APPLE)
 
 # Location of morrowind data files
 if (APPLE)
diff --git a/apps/openmw/mwinput/inputmanagerimp.cpp b/apps/openmw/mwinput/inputmanagerimp.cpp
index 35487e339..9b50be7ca 100644
--- a/apps/openmw/mwinput/inputmanagerimp.cpp
+++ b/apps/openmw/mwinput/inputmanagerimp.cpp
@@ -503,7 +503,7 @@ namespace MWInput
 
         mInputBinder->keyPressed (arg);
 
-        if(arg.keysym.sym == SDLK_RETURN
+        if((arg.keysym.sym == SDLK_RETURN || arg.keysym.sym == SDLK_KP_ENTER)
             && MWBase::Environment::get().getWindowManager()->isGuiMode())
         {
             // Pressing enter when a messagebox is prompting for "ok" will activate the ok button