diff --git a/doomsday/config.pri b/doomsday/config.pri
index 4eb2676f64..22e7b08887 100644
--- a/doomsday/config.pri
+++ b/doomsday/config.pri
@@ -9,6 +9,7 @@
 #       line, as it is checked before config_user.pri is read.
 #
 # CONFIG options for Doomsday:
+# - deng_32bitonly          Only do a 32-bit build (no 64-bit)
 # - deng_aptunstable        Include the unstable apt repository
 # - deng_nofixedasm         Disable assembler fixed-point math
 # - deng_openal             Build the OpenAL sound driver
@@ -154,10 +155,18 @@ deng_nofixedasm {
 macx {
     # Select OS version.
     deng_snowleopard {
-        echo("Using Mac OS 10.6 SDK (32/64-bit Intel).")
-        QMAKE_MAC_SDK = /Developer/SDKs/MacOSX10.6.sdk
-        QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6
-        CONFIG += x86 x86_64
+        deng_32bitonly {
+            echo("Using Mac OS 10.6 SDK (32-bit Intel).")
+            QMAKE_MAC_SDK = /Developer/SDKs/MacOSX10.6.sdk
+            QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6
+            CONFIG += x86
+            CONFIG -= x86_64
+        } else {
+            echo("Using Mac OS 10.6 SDK (32/64-bit Intel).")
+            QMAKE_MAC_SDK = /Developer/SDKs/MacOSX10.6.sdk
+            QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6
+            CONFIG += x86 x86_64
+        }
     }
     else {
         echo("Using Mac OS 10.4 SDK (32-bit Intel + PowerPC).")
diff --git a/doomsday/dep_sdl.pri b/doomsday/dep_sdl.pri
index 63125de686..56cfa51ee4 100644
--- a/doomsday/dep_sdl.pri
+++ b/doomsday/dep_sdl.pri
@@ -49,7 +49,7 @@ else:macx {
 
     LIBS += -framework SDL -framework SDL_mixer
 
-    !deng_snowleopard {
+    deng_32bitonly|!deng_snowleopard {
         # Also include SDL_net.
         INCLUDEPATH += $${SDL_FRAMEWORK_DIR}/SDL_net.framework/Headers
         LIBS += -framework SDL_net