diff --git a/src/tangerine.cpp b/src/tangerine.cpp
index c054cd2..8a52461 100644
--- a/src/tangerine.cpp
+++ b/src/tangerine.cpp
@@ -19,46 +19,6 @@ GLContext* initGLContext(MemoryArena* arena,
 
 // interface
 
-void
-initRenderGroup(RenderGroup* rg,
-		MemoryArena* arena,
-		shader_program* shader,
-		u32 num_entities,
-		const char* name)
-{
-	rg->max_entities = num_entities;
-	rg->shader = shader;
-	rg->name = arenaCopyCStr(arena, name);
-	rg->entities = ARENA_ALLOC(arena, Entity, num_entities);
-}
-
-void
-freeRenderGroup(RenderGroup* rg, MemoryArena* arena)
-{
-	printf("%s(), should probably look into freeing arena memory?\n",
-			__FUNCTION__);
-	assert(0);
-}
-
-Entity*
-getFreeEntity(RenderGroup* rg)
-{
-	if (rg->num_entities < rg->max_entities)
-		return &rg->entities[rg->num_entities++];
-
-	printf("%s(), render group full\n", __FUNCTION__);
-	return nullptr;
-}
-
-RenderGroup*
-getFreeRenderGroup(RenderState* rs)
-{
-	if (rs->num_render_groups < rs->max_render_groups)
-		return &rs->render_groups[rs->num_render_groups++];
-
-	printf("%s(), no free render group\n", __FUNCTION__);
-	return nullptr;
-}
 
 RenderState*
 initRenderState(u32 max_models,
@@ -115,6 +75,47 @@ freeRenderState(RenderState*& rs)
 	SDL_Quit();
 }
 
+void
+initRenderGroup(RenderGroup* rg,
+		MemoryArena* arena,
+		shader_program* shader,
+		u32 num_entities,
+		const char* name)
+{
+	rg->max_entities = num_entities;
+	rg->shader = shader;
+	rg->name = arenaCopyCStr(arena, name);
+	rg->entities = ARENA_ALLOC(arena, Entity, num_entities);
+}
+
+void
+freeRenderGroup(RenderGroup* rg, MemoryArena* arena)
+{
+	printf("%s(), should probably look into freeing arena memory?\n",
+			__FUNCTION__);
+	assert(0);
+}
+
+RenderGroup*
+getFreeRenderGroup(RenderState* rs)
+{
+	if (rs->num_render_groups < rs->max_render_groups)
+		return &rs->render_groups[rs->num_render_groups++];
+
+	printf("%s(), no free render group\n", __FUNCTION__);
+	return nullptr;
+}
+
+Entity*
+getFreeEntity(RenderGroup* rg)
+{
+	if (rg->num_entities < rg->max_entities)
+		return &rg->entities[rg->num_entities++];
+
+	printf("%s(), render group full\n", __FUNCTION__);
+	return nullptr;
+}
+
 void
 doRenderLoop(RenderState* rs,
 	u32 framerate,
diff --git a/src/tangerine.h b/src/tangerine.h
index 69d496e..edd1954 100644
--- a/src/tangerine.h
+++ b/src/tangerine.h
@@ -103,8 +103,6 @@ RenderState* initRenderState(u32 max_models = DEFAULT_MODEL_COUNT,
 
 void freeRenderState(RenderState*& rs);
 
-RenderGroup* getFreeRenderGroup(RenderState* rs);
-
 #define DEFAULT_ENTITY_COUNT 256
 void initRenderGroup(RenderGroup* rg,
 		MemoryArena* arena,
@@ -114,6 +112,8 @@ void initRenderGroup(RenderGroup* rg,
 
 void freeRenderGroup(RenderGroup* rg, MemoryArena* arena);
 
+RenderGroup* getFreeRenderGroup(RenderState* rs);
+
 Entity* getFreeEntity(RenderGroup* rg);
 
 // NOTE: callback function signature to use with renDoRenderLoop()