diff --git a/src/eccodes.h b/src/eccodes.h
index 9dfdb599b..e5f4bf160 100644
--- a/src/eccodes.h
+++ b/src/eccodes.h
@@ -127,35 +127,30 @@ typedef struct grib_key_value_list    codes_key_value_list;
     \ingroup codes_handle
     \struct codes_handle
 */
-struct codes_handle;
 typedef struct grib_handle            codes_handle;
 
 /*! GRIB multi field handle,   structure used to build multi fields messages.
     \ingroup codes_handle
     \struct codes_multi_handle
  */
-struct codes_multi_handle;
 typedef struct grib_multi_handle      codes_multi_handle;
 
 /*! Codes context,  structure containing the memory methods, the parsers and the formats.
     \ingroup codes_context
     \struct codes_context
 */
-struct codes_context;
 typedef struct grib_context           codes_context;
 
 /*! Codes iterator, structure supporting a geographic iteration of values in a GRIB message.
     \ingroup iterators
     \struct codes_iterator
 */
-struct codes_iterator;
 typedef struct grib_iterator          codes_iterator;
 
 /*! Codes nearest, structure used to find the nearest points of a latitude longitude point in a GRIB message.
     \ingroup iterators
     \struct codes_nearest
 */
-struct codes_nearest;
 typedef struct grib_nearest           codes_nearest;
 typedef struct grib_box               codes_box;
 typedef struct grib_points            codes_points;
@@ -164,7 +159,6 @@ typedef struct grib_points            codes_points;
     \ingroup keys_iterator
     \struct codes_keys_iterator
 */
-struct codes_keys_iterator;
 typedef struct grib_keys_iterator     codes_keys_iterator;
 
 typedef struct grib_fieldset          codes_fieldset;
@@ -199,7 +193,6 @@ The codes_index is the structure giving indexed access to messages in a file.
  * \ingroup codes_index
  * \struct codes_index
 */
-struct codes_index;
 typedef struct grib_index             codes_index;
 
 /**