diff --git a/source/blender/blenkernel/intern/constraint.c b/source/blender/blenkernel/intern/constraint.c
index 5dad01a126f..c3f05e497f1 100644
--- a/source/blender/blenkernel/intern/constraint.c
+++ b/source/blender/blenkernel/intern/constraint.c
@@ -2015,6 +2015,7 @@ static void pycon_get_tarmat (bConstraint *con, bConstraintOb *cob, bConstraintT
 static void pycon_evaluate (bConstraint *con, bConstraintOb *cob, ListBase *targets)
 {
 #ifdef DISABLE_PYTHON
+	(void)con; (void)cob; (void)targets; /* unused */
 	return;
 #else
 	bPythonConstraint *data= con->data;
diff --git a/source/blender/editors/object/object_constraint.c b/source/blender/editors/object/object_constraint.c
index 02c88d4149b..09760a8f51b 100644
--- a/source/blender/editors/object/object_constraint.c
+++ b/source/blender/editors/object/object_constraint.c
@@ -200,7 +200,10 @@ char *buildmenu_pyconstraints (Text *con_text, int *pyconindex)
 /* this callback gets called when the 'refresh' button of a pyconstraint gets pressed */
 void update_pyconstraint_cb (void *arg1, void *arg2)
 {
-#ifndef DISABLE_PYTHON
+#ifdef DISABLE_PYTHON
+	(void)arg1; /* unused */
+	(void)arg2; /* unused */
+#else
 	Object *owner= (Object *)arg1;
 	bConstraint *con= (bConstraint *)arg2;
 	if (owner && con)
diff --git a/source/blender/editors/space_script/script_edit.c b/source/blender/editors/space_script/script_edit.c
index 7e3b14ca04a..23bc385c758 100644
--- a/source/blender/editors/space_script/script_edit.c
+++ b/source/blender/editors/space_script/script_edit.c
@@ -60,6 +60,8 @@ static int run_pyfile_exec(bContext *C, wmOperator *op)
 		ED_region_tag_redraw(ar);
 		return OPERATOR_FINISHED;
 	}
+#else
+	(void)C; /* unused */
 #endif
 	return OPERATOR_CANCELLED; /* FAIL */
 }
@@ -89,6 +91,8 @@ static int script_reload_exec(bContext *C, wmOperator *UNUSED(op))
 	BPY_eval_string(C, "__import__('bpy').utils.load_scripts(reload_scripts=True)");
 	WM_cursor_wait(0);
 	return OPERATOR_FINISHED;
+#else
+	(void)C; /* unused */
 #endif
 	return OPERATOR_CANCELLED;
 }
diff --git a/source/blender/editors/space_text/text_ops.c b/source/blender/editors/space_text/text_ops.c
index 8d4f3f87f66..af29e575482 100644
--- a/source/blender/editors/space_text/text_ops.c
+++ b/source/blender/editors/space_text/text_ops.c
@@ -558,6 +558,8 @@ static int run_script_poll(bContext *C)
 static int run_script_exec(bContext *C, wmOperator *op)
 {
 #ifdef DISABLE_PYTHON
+	(void)C; /* unused */
+
 	BKE_report(op->reports, RPT_ERROR, "Python disabled in this build");
 
 	return OPERATOR_CANCELLED;
diff --git a/source/blender/editors/space_view3d/view3d_draw.c b/source/blender/editors/space_view3d/view3d_draw.c
index 7722ca5605b..30880db0c90 100644
--- a/source/blender/editors/space_view3d/view3d_draw.c
+++ b/source/blender/editors/space_view3d/view3d_draw.c
@@ -1459,7 +1459,7 @@ static void draw_dupli_objects_color(Scene *scene, ARegion *ar, View3D *v3d, Bas
 {
 	RegionView3D *rv3d= ar->regiondata;
 	ListBase *lb;
-	DupliObject *dob_prev= NULL, *dob, *dob_next;
+	DupliObject *dob_prev= NULL, *dob, *dob_next= NULL;
 	Base tbase;
 	BoundBox bb, *bb_tmp; /* use a copy because draw_object, calls clear_mesh_caches */
 	GLuint displist=0;
diff --git a/source/blender/modifiers/CMakeLists.txt b/source/blender/modifiers/CMakeLists.txt
index 40f0ad127cd..7524244c701 100644
--- a/source/blender/modifiers/CMakeLists.txt
+++ b/source/blender/modifiers/CMakeLists.txt
@@ -85,7 +85,7 @@ ENDIF(WITH_MOD_BOOLEAN)
 IF(WITH_MOD_DECIMATE)
 	ADD_DEFINITIONS(-DWITH_MOD_DECIMATE)
 	LIST(APPEND INC ../../../intern/decimation/extern)
-ENDIF(WITH_MOD_BOOLEAN)
+ENDIF(WITH_MOD_DECIMATE)
 
 IF(NOT WITH_MOD_FLUID)
 	ADD_DEFINITIONS(-DDISABLE_ELBEEM)
diff --git a/source/blender/render/intern/raytrace/rayobject.cpp b/source/blender/render/intern/raytrace/rayobject.cpp
index 84ec56e131a..119a62ad05a 100644
--- a/source/blender/render/intern/raytrace/rayobject.cpp
+++ b/source/blender/render/intern/raytrace/rayobject.cpp
@@ -533,7 +533,11 @@ float RE_rayobject_cost(RayObject *r)
 		r = RE_rayobject_align( r );
 		return r->api->cost( r );
 	}
-	else assert(0);
+	else
+	{
+		assert(0);
+		return 1.0; /* XXX, better default value? */
+	}
 }
 
 void RE_rayobject_hint_bb(RayObject *r, RayHint *hint, float *min, float *max)
diff --git a/source/blender/windowmanager/intern/wm_init_exit.c b/source/blender/windowmanager/intern/wm_init_exit.c
index b319058ce5c..e373579577d 100644
--- a/source/blender/windowmanager/intern/wm_init_exit.c
+++ b/source/blender/windowmanager/intern/wm_init_exit.c
@@ -145,6 +145,9 @@ void WM_init(bContext *C, int argc, char **argv)
 	BPY_set_context(C); /* necessary evil */
 	BPY_start_python(argc, argv);
 	BPY_load_user_modules(C);
+#else
+	(void)argc; /* unused */
+	(void)argv; /* unused */
 #endif
 
 	wm_init_reports(C); /* reports cant be initialized before the wm */
@@ -212,7 +215,7 @@ int WM_init_game(bContext *C)
 	wmWindow* win;
 
 	ScrArea *sa;
-	ARegion *ar;
+	ARegion *ar= NULL;
 
 	Scene *scene= CTX_data_scene(C);
 
diff --git a/source/creator/creator.c b/source/creator/creator.c
index ed2f671a161..25f01ea0bea 100644
--- a/source/creator/creator.c
+++ b/source/creator/creator.c
@@ -853,6 +853,7 @@ static int run_python(int argc, char **argv, void *data)
 		return 0;
 	}
 #else
+	(void)argc; (void)argv; (void)data; /* unused */
 	printf("This blender was built without python support\n");
 	return 0;
 #endif /* DISABLE_PYTHON */
@@ -868,6 +869,7 @@ static int run_python_console(int UNUSED(argc), char **argv, void *data)
 
 	return 0;
 #else
+	(void)argv; (void)data; /* unused */
 	printf("This blender was built without python support\n");
 	return 0;
 #endif /* DISABLE_PYTHON */