diff --git a/src/lib/eina/eina_file.c b/src/lib/eina/eina_file.c
index b9d7b14d39..7b8aaff9e6 100644
--- a/src/lib/eina/eina_file.c
+++ b/src/lib/eina/eina_file.c
@@ -1122,7 +1122,7 @@ eina_file_map_free(Eina_File *file, void *map)
 }
 
 EAPI void
-eina_file_map_populate(Eina_File *file, Eina_File_Populate rule, void *map,
+eina_file_map_populate(Eina_File *file, Eina_File_Populate rule, const void *map,
                        unsigned long int offset, unsigned long int length)
 {
    Eina_File_Map *em;
diff --git a/src/lib/eina/eina_file.h b/src/lib/eina/eina_file.h
index 234cb2ace4..8384e2a22a 100644
--- a/src/lib/eina/eina_file.h
+++ b/src/lib/eina/eina_file.h
@@ -629,7 +629,7 @@ EAPI void eina_file_map_free(Eina_File *file, void *map);
  * @sine 1.8
  */
 EAPI void
-eina_file_map_populate(Eina_File *file, Eina_File_Populate rule, void *map,
+eina_file_map_populate(Eina_File *file, Eina_File_Populate rule, const void *map,
                        unsigned long int offset, unsigned long int length);
 
 /**