diff --git a/overviewer_core/src/primitives/cave.c b/overviewer_core/src/primitives/cave.c
index e899777..064f498 100644
--- a/overviewer_core/src/primitives/cave.c
+++ b/overviewer_core/src/primitives/cave.c
@@ -105,7 +105,6 @@ cave_hidden(void *data, RenderState *state, int x, int y, int z) {
 static int
 cave_start(void *data, RenderState *state, PyObject *support) {
     RenderPrimitiveCave* self;
-    int ret;
     self = (RenderPrimitiveCave *)data;
 
     if (!render_mode_parse_option(support, "only_lit", "i", &(self->only_lit)))
diff --git a/overviewer_core/src/primitives/overlay-spawn.c b/overviewer_core/src/primitives/overlay-spawn.c
index 872dc0f..137fd48 100644
--- a/overviewer_core/src/primitives/overlay-spawn.c
+++ b/overviewer_core/src/primitives/overlay-spawn.c
@@ -26,11 +26,9 @@ typedef struct {
 static void get_color(void *data, RenderState *state,
                       unsigned char *r, unsigned char *g, unsigned char *b, unsigned char *a) {
     
-    RenderPrimitiveSpawn* self = (RenderPrimitiveSpawn *)data;
     int x = state->x, y = state->y, z = state->z;
     int y_light = y + 1;
     unsigned char blocklight, skylight;
-    PyObject *block_py;
     
     /* set a nice, pretty red color */
     *r = 229;
@@ -75,8 +73,6 @@ overlay_spawn_start(void *data, RenderState *state, PyObject *support) {
 
 static void
 overlay_spawn_finish(void *data, RenderState *state) {
-    RenderPrimitiveSpawn* self = (RenderPrimitiveSpawn *)data;
-    
     /* chain up */
     primitive_overlay.finish(data, state);
 }
diff --git a/overviewer_core/src/primitives/overlay.c b/overviewer_core/src/primitives/overlay.c
index 6c1215b..0645a4d 100644
--- a/overviewer_core/src/primitives/overlay.c
+++ b/overviewer_core/src/primitives/overlay.c
@@ -27,7 +27,6 @@ static void get_color(void *data, RenderState *state,
 
 static int
 overlay_start(void *data, RenderState *state, PyObject *support) {
-    PyObject *facemasks_py;
     RenderPrimitiveOverlay *self = (RenderPrimitiveOverlay *)data;
     
     self->facemask_top = PyObject_GetAttrString(support, "facemask_top");
diff --git a/setup.py b/setup.py
index ac22a5c..4c8df8a 100755
--- a/setup.py
+++ b/setup.py
@@ -265,6 +265,8 @@ class CustomBuildExt(build_ext):
         if c == "unix":
             # customize the build options for this compilier
             for e in self.extensions:
+                e.extra_compile_args.append("-Wno-unused-variable") # quell some annoying warnings
+                e.extra_compile_args.append("-Wno-unused-function") # quell some annoying warnings
                 e.extra_compile_args.append("-Wdeclaration-after-statement")
                 e.extra_compile_args.append("-Werror=declaration-after-statement")