diff --git a/cogl/cogl-color.c b/cogl/cogl-color.c
index b23ef4a5b..1f9a01ee9 100644
--- a/cogl/cogl-color.c
+++ b/cogl/cogl-color.c
@@ -108,7 +108,7 @@ cogl_color_set_from_4f (CoglColor *color,
 
 void
 cogl_color_init_from_4fv (CoglColor *color,
-                          float *color_array)
+                          const float *color_array)
 {
   _COGL_RETURN_IF_FAIL (color != NULL);
 
diff --git a/cogl/cogl-color.h b/cogl/cogl-color.h
index 5bd7936bc..97d622943 100644
--- a/cogl/cogl-color.h
+++ b/cogl/cogl-color.h
@@ -169,7 +169,7 @@ cogl_color_set_from_4f (CoglColor *color,
  */
 void
 cogl_color_init_from_4fv (CoglColor *color,
-                          float *color_array);
+                          const float *color_array);
 
 /**
  * cogl_color_get_red_byte: