diff --git a/src/backend/file.h b/src/backend/file.h
index 4fd672187..1833f0f54 100644
--- a/src/backend/file.h
+++ b/src/backend/file.h
@@ -170,12 +170,13 @@ lumiera_file_release_mmap (LumieraFile self, LumieraMMap map);
 
 /**
  * helper macro for acquireing and releasing maped regions
+ * @param nobugflag yet unused
  * @param file the file from from where to acquire the mapped region
  * @param start the start offset for the mmaped region
  * @param size the length of the requested block
  * @param addr name of a void* variable pointing to the requested memory
  */
-#define LUMIERA_FILE_MMAP_SECTION(file, start, size, addr)              \
+#define LUMIERA_FILE_MMAP_SECTION(nobugflag, file, start, size, addr)   \
   for (LumieraMMap map_##__LINE__ =                                     \
          lumiera_file_mmap_acquire (file, start, size);                 \
        map_##__LINE__;                                                  \
diff --git a/tests/backend/test-filemmap.c b/tests/backend/test-filemmap.c
index 921d2b3ab..c93e2543c 100644
--- a/tests/backend/test-filemmap.c
+++ b/tests/backend/test-filemmap.c
@@ -319,7 +319,7 @@ TEST (mmap_section)
   LumieraFile file = lumiera_file_new (",tmp-filemmap", LUMIERA_FILE_RECREATE);
   lumiera_file_set_chunksize_bias (file, 4096, 0);
 
-  LUMIERA_FILE_MMAP_SECTION(file, 20, 20, addr)
+  LUMIERA_FILE_MMAP_SECTION (NOBUG_ON, file, 20, 20, addr)
     {
       strcpy (addr, "mmap section");
     }
@@ -337,7 +337,7 @@ TEST (mmap_section_err)
   LumieraFile file = lumiera_file_new (",tmp-filemmap", LUMIERA_FILE_RECREATE);
   /* forgot to set lumiera_file_chunksize_set (file, 4096); */
 
-  LUMIERA_FILE_MMAP_SECTION(file, 20, 20, addr)
+  LUMIERA_FILE_MMAP_SECTION (NOBUG_ON, file, 20, 20, addr)
     {
       strcpy (addr, "mmap section");
     }