diff --git a/legacy/eina/src/include/eina_file.h b/legacy/eina/src/include/eina_file.h
index 397ee26e81..a75ddac37c 100644
--- a/legacy/eina/src/include/eina_file.h
+++ b/legacy/eina/src/include/eina_file.h
@@ -281,7 +281,7 @@ EAPI void eina_file_close(Eina_File *file);
  *
  * @since 1.1
  */
-EAPI unsigned long int eina_file_size_get(Eina_File *file);
+EAPI size_t eina_file_size_get(Eina_File *file);
 
 /**
  * @brief Get the last modification time of an open file.
diff --git a/legacy/eina/src/lib/eina_file.c b/legacy/eina/src/lib/eina_file.c
index 97502ee4f4..ec7eb55ffa 100644
--- a/legacy/eina/src/lib/eina_file.c
+++ b/legacy/eina/src/lib/eina_file.c
@@ -855,7 +855,7 @@ eina_file_close(Eina_File *file)
      }
 }
 
-EAPI unsigned long int
+EAPI size_t
 eina_file_size_get(Eina_File *file)
 {
    return file->length;
diff --git a/legacy/eina/src/lib/eina_file_win32.c b/legacy/eina/src/lib/eina_file_win32.c
index 259dca6743..1cd8665ccc 100644
--- a/legacy/eina/src/lib/eina_file_win32.c
+++ b/legacy/eina/src/lib/eina_file_win32.c
@@ -890,7 +890,7 @@ eina_file_close(Eina_File *file)
      }
 }
 
-EAPI unsigned long int
+EAPI size_t
 eina_file_size_get(Eina_File *file)
 {
    return file->length;