diff --git a/sweet.h b/sweet.h
index 876f767..021930e 100644
--- a/sweet.h
+++ b/sweet.h
@@ -25,6 +25,7 @@
 #include "sweet_math.h"
 #include "sweet_matrix.h"
 #include "sweet_matrix_stack.h"
+#include "sweet_geometry.h"
 
 #endif
 
diff --git a/sweet_geometry.c b/sweet_geometry.c
index 4363c49..15b7eee 100644
--- a/sweet_geometry.c
+++ b/sweet_geometry.c
@@ -226,7 +226,7 @@ middle_point (struct map * map,
     v2 = v->vertices[b];
     middle = sweet_vector_middle3 (v1, v2);
 
-    if (v->buffer < (v->nb_vertices * sizeof (vec3)))
+    if (v->buffer <= (v->nb_vertices * sizeof (vec3)))
     {
         vec3 * p;
         v->buffer = v->buffer * 2;
@@ -302,9 +302,9 @@ sweet_geometry_icosphere (unsigned int nb_iterations, float scale,
     unsigned int j;
 
     map_init (&map);
-
     *mesh_vertices = NULL;
     *mesh_indices = NULL;
+
     nb_faces = 20;
     v.nb_vertices = 12;
     v.buffer = v.nb_vertices * sizeof (vec3);
@@ -348,7 +348,7 @@ sweet_geometry_icosphere (unsigned int nb_iterations, float scale,
     (*mesh_indices) = malloc (nb_faces * sizeof (unsigned int) * 3);
     (*mesh_vertices) = malloc (v.nb_vertices * sizeof (float) * 3);
 
-    if (*mesh_indices == NULL || *mesh_vertices == NULL)
+    if ((*mesh_indices) == NULL || (*mesh_vertices) == NULL)
     {
         free_all (&map, &v, root, *mesh_vertices, *mesh_indices);
         *count_vertices = 0;