diff --git a/python/obitools3/obidms/capi/obidmscolumn.pxd b/python/obitools3/obidms/capi/obidmscolumn.pxd
index 6249831..73f682e 100644
--- a/python/obitools3/obidms/capi/obidmscolumn.pxd
+++ b/python/obitools3/obidms/capi/obidmscolumn.pxd
@@ -69,7 +69,7 @@ cdef extern from "obidmscolumn.h" nogil:
                                                            const_char_p column_name,
                                                            obiversion_t version_number)
     
-    int obi_unmap_header(OBIDMS_column_header_p header)
+    int obi_close_header(OBIDMS_column_header_p header)
         
     char* obi_column_format_date(time_t date)
 
diff --git a/src/obidmscolumn.c b/src/obidmscolumn.c
index 2b463d6..c9bcb9d 100644
--- a/src/obidmscolumn.c
+++ b/src/obidmscolumn.c
@@ -1358,7 +1358,7 @@ OBIDMS_column_header_p obi_column_get_header_from_name(OBIDMS_p dms, const char*
 }
 
 
-int obi_unmap_header(OBIDMS_column_header_p header)
+int obi_close_header(OBIDMS_column_header_p header)
 {
 	if (munmap(header, header->header_size) < 0)
 	{
@@ -1386,7 +1386,7 @@ index_t obi_column_get_element_index_from_name(OBIDMS_column_p column, const cha
 
 	element_index = 0;
 
-	name = strtok (elements_names, ";");	// TODO not thread safe, see strtok_r maybe
+	name = strtok(elements_names, ";");	// TODO not thread safe, see strtok_r maybe
 	if (strcmp(element_name, name) == 0)
 	{
 		free(elements_names);
@@ -1396,7 +1396,7 @@ index_t obi_column_get_element_index_from_name(OBIDMS_column_p column, const cha
 
 	while (name != NULL)
 	{
-		name = strtok (NULL, ";");			// TODO not thread safe, see strtok_r maybe
+		name = strtok(NULL, ";");			// TODO not thread safe, see strtok_r maybe
 		if (strcmp(element_name, name) == 0)
 		{
 			free(elements_names);
diff --git a/src/obidmscolumn.h b/src/obidmscolumn.h
index 14f1d74..614211f 100644
--- a/src/obidmscolumn.h
+++ b/src/obidmscolumn.h
@@ -311,7 +311,7 @@ OBIDMS_column_header_p obi_column_get_header_from_name(OBIDMS_p dms, const char*
  * @since October 2015
  * @author Celine Mercier (celine.mercier@metabarcoding.org)
  */
-int obi_unmap_header(OBIDMS_column_header_p header);
+int obi_close_header(OBIDMS_column_header_p header);
 
 
 /**