diff --git a/source/blender/makesdna/DNA_userdef_types.h b/source/blender/makesdna/DNA_userdef_types.h
index 50e66f91028..78bc1c73ec9 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -365,7 +365,7 @@ typedef struct UserDef {
 	short recent_files;		/* maximum number of recently used files to remember  */
 	short smooth_viewtx;	/* miliseconds to spend spinning the view */
 	short glreslimit;
-	short ndof_pan, ndof_rotate;
+/*	short ndof_pan, ndof_rotate; */
 	short curssize;
 	short color_picker_type;
 	short ipo_new;			/* interpolation mode for newly added F-Curves */
@@ -375,7 +375,10 @@ typedef struct UserDef {
 	short scrcastwait;		/* milliseconds between screencast snapshots */
 	
 	short widget_unit;		/* defaults to 20 for 72 DPI setting */
-	short pad[3];			
+	short pad[1];			
+
+	float ndof_sensitivity;	/* overall sensitivity of 3D mouse */
+	int ndof_flag;			/* flags for 3D mouse */
 
 	char versemaster[160];
 	char verseuser[160];
@@ -578,6 +581,17 @@ extern UserDef U; /* from blenkernel blender.c */
 #define TH_OLDSKOOL 	3
 #define TH_SHADED   	4
 
+/* ndof_flag (3D mouse options) */
+#define NDOF_SHOW_GUIDE     (1 << 0)
+#define NDOF_FLY_HELICOPTER (1 << 1)
+#define NDOF_LOCK_HORIZON   (1 << 2)
+/* the following might not need to be saved between sessions,
+   but they do need to live somewhere accessible...
+#define NDOF_SHOULD_PAN     (1 << 3)
+#define NDOF_SHOULD_ZOOM    (1 << 4)
+#define NDOF_SHOULD_ROTATE  (1 << 5)
+*/
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/makesrna/intern/rna_userdef.c b/source/blender/makesrna/intern/rna_userdef.c
index b67805c97b9..86b88718ba8 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -2705,7 +2705,9 @@ static void rna_def_userdef_input(BlenderRNA *brna)
 	RNA_def_property_int_sdna(prop, NULL, "dragthreshold");
 	RNA_def_property_range(prop, 3, 40);
 	RNA_def_property_ui_text(prop, "Drag Threshold", "Amount of pixels you have to drag before dragging UI items happens");
-	
+
+  	/* 3D mouse settings */
+/*	
 	prop= RNA_def_property(srna, "ndof_pan_speed", PROP_INT, PROP_NONE);
 	RNA_def_property_int_sdna(prop, NULL, "ndof_pan");
 	RNA_def_property_range(prop, 0, 200);
@@ -2715,7 +2717,24 @@ static void rna_def_userdef_input(BlenderRNA *brna)
 	RNA_def_property_int_sdna(prop, NULL, "ndof_rotate");
 	RNA_def_property_range(prop, 0, 200);
 	RNA_def_property_ui_text(prop, "NDof Rotation Speed", "The overall rotation speed of an NDOF device, as percent of standard");
-	
+*/
+	prop= RNA_def_property(srna, "ndof_sensitivity", PROP_FLOAT, PROP_NONE);
+	RNA_def_property_range(prop, 0.25f, 4.0f);
+	RNA_def_property_ui_text(prop, "3D Mouse Sensitivity", "Baseline sensitivity of the 3D Mouse");
+
+	prop= RNA_def_property(srna, "ndof_show_guide", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "ndof_flag", NDOF_SHOW_GUIDE);
+	RNA_def_property_ui_text(prop, "Show 3D Mouse Guide", "Visualize the center and axis of rotation (or projected position in fly mode)");
+
+	prop= RNA_def_property(srna, "ndof_lock_horizon", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "ndof_flag", NDOF_LOCK_HORIZON);
+	RNA_def_property_ui_text(prop, "Lock Horizon", "Keep horizon level while flying with 3D Mouse");
+
+	prop= RNA_def_property(srna, "ndof_fly_helicopter", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "ndof_flag", NDOF_FLY_HELICOPTER);
+	RNA_def_property_ui_text(prop, "Helicopter Fly Mode", "");
+
+
 	prop= RNA_def_property(srna, "mouse_double_click_time", PROP_INT, PROP_NONE);
 	RNA_def_property_int_sdna(prop, NULL, "dbl_click_time");
 	RNA_def_property_range(prop, 1, 1000);