diff --git a/cogl/cogl/cogl-indices-private.h b/cogl/cogl/cogl-indices-private.h
index b3d923919..b9760d58a 100644
--- a/cogl/cogl/cogl-indices-private.h
+++ b/cogl/cogl/cogl-indices-private.h
@@ -46,3 +46,6 @@ struct _CoglIndices
   CoglIndicesType type;
 
 };
+
+size_t
+cogl_indices_type_get_size (CoglIndicesType type);
diff --git a/cogl/cogl/cogl-indices.c b/cogl/cogl/cogl-indices.c
index 1989d8af6..0bfd3a3b9 100644
--- a/cogl/cogl/cogl-indices.c
+++ b/cogl/cogl/cogl-indices.c
@@ -67,8 +67,8 @@ cogl_indices_class_init (CoglIndicesClass *class)
   object_class->dispose = cogl_indices_dispose;
 }
 
-static size_t
-sizeof_indices_type (CoglIndicesType type)
+size_t
+cogl_indices_type_get_size (CoglIndicesType type)
 {
   switch (type)
     {
@@ -103,7 +103,7 @@ cogl_indices_new (CoglContext *context,
                   const void *indices_data,
                   int n_indices)
 {
-  size_t buffer_bytes = sizeof_indices_type (type) * n_indices;
+  size_t buffer_bytes = cogl_indices_type_get_size (type) * n_indices;
   CoglIndexBuffer *index_buffer = cogl_index_buffer_new (context, buffer_bytes);
   CoglBuffer *buffer = COGL_BUFFER (index_buffer);
   CoglIndices *indices;
diff --git a/cogl/cogl/driver/gl/cogl-framebuffer-gl.c b/cogl/cogl/driver/gl/cogl-framebuffer-gl.c
index 36edc4cdb..8c80d9a25 100644
--- a/cogl/cogl/driver/gl/cogl-framebuffer-gl.c
+++ b/cogl/cogl/driver/gl/cogl-framebuffer-gl.c
@@ -34,6 +34,7 @@
 #include "cogl/cogl-context-private.h"
 #include "cogl/cogl-framebuffer-private.h"
 #include "cogl/cogl-framebuffer.h"
+#include "cogl/cogl-indices-private.h"
 #include "cogl/cogl-offscreen-private.h"
 #include "cogl/cogl-texture-private.h"
 #include "cogl/driver/gl/cogl-util-gl-private.h"
@@ -324,21 +325,6 @@ cogl_gl_framebuffer_draw_attributes (CoglFramebufferDriver  *driver,
       glDrawArrays ((GLenum)mode, first_vertex, n_vertices));
 }
 
-static size_t
-sizeof_index_type (CoglIndicesType type)
-{
-  switch (type)
-    {
-    case COGL_INDICES_TYPE_UNSIGNED_BYTE:
-      return 1;
-    case COGL_INDICES_TYPE_UNSIGNED_SHORT:
-      return 2;
-    case COGL_INDICES_TYPE_UNSIGNED_INT:
-      return 4;
-    }
-  g_return_val_if_reached (0);
-}
-
 static void
 cogl_gl_framebuffer_draw_indexed_attributes (CoglFramebufferDriver  *driver,
                                              CoglPipeline           *pipeline,
@@ -371,7 +357,7 @@ cogl_gl_framebuffer_draw_indexed_attributes (CoglFramebufferDriver  *driver,
   base = _cogl_buffer_gl_bind (buffer,
                                COGL_BUFFER_BIND_TARGET_INDEX_BUFFER, NULL);
   buffer_offset = cogl_indices_get_offset (indices);
-  index_size = sizeof_index_type (cogl_indices_get_indices_type (indices));
+  index_size = cogl_indices_type_get_size (cogl_indices_get_indices_type (indices));
 
   switch (cogl_indices_get_indices_type (indices))
     {