diff --git a/gdb/gdb_bfd.c b/gdb/gdb_bfd.c
index 7e743891aed..36ef5e1cc5a 100644
--- a/gdb/gdb_bfd.c
+++ b/gdb/gdb_bfd.c
@@ -288,14 +288,13 @@ mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
 
 gdb_bfd_ref_ptr
 gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size,
-				 const char *target,
-				 const char *filename)
+				 const char *target)
 {
   struct target_buffer *buffer = XNEW (struct target_buffer);
 
   buffer->base = addr;
   buffer->size = size;
-  return gdb_bfd_openr_iovec (filename ? filename : "<in-memory>", target,
+  return gdb_bfd_openr_iovec ("<in-memory>", target,
 			      mem_bfd_iovec_open,
 			      buffer,
 			      mem_bfd_iovec_pread,
diff --git a/gdb/gdb_bfd.h b/gdb/gdb_bfd.h
index 86f7be85f20..6ea16ddc735 100644
--- a/gdb/gdb_bfd.h
+++ b/gdb/gdb_bfd.h
@@ -201,11 +201,12 @@ int gdb_bfd_requires_relocations (bfd *abfd);
 bool gdb_bfd_get_full_section_contents (bfd *abfd, asection *section,
 					gdb::byte_vector *contents);
 
-/* Create and initialize a BFD handle from a target in-memory range.  */
+/* Create and initialize a BFD handle from a target in-memory range.  The
+   BFD starts at ADDR and is SIZE bytes long.  TARGET is the BFD target
+   name as used in bfd_find_target.  */
 
 gdb_bfd_ref_ptr gdb_bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size,
-						 const char *target,
-						 const char *filename = nullptr);
+						 const char *target);
 
 /* Range adapter for a BFD's sections.