diff --git a/pw_bloat/py/pw_bloat/__main__.py b/pw_bloat/py/pw_bloat/__main__.py
index 5aee9fa..30d3bb2 100644
--- a/pw_bloat/py/pw_bloat/__main__.py
+++ b/pw_bloat/py/pw_bloat/__main__.py
@@ -39,9 +39,9 @@
     parser.add_argument(
         '-d',
         '--data-sources',
-        help='Comma-separated list of additional Bloaty data sources to report',
+        help='Comma-separated list of Bloaty data sources to report',
         type=lambda s: s.split(','),
-        default=(),
+        default=('memoryregions,sections'),
     )
     parser.add_argument(
         '--diff',
@@ -72,7 +72,7 @@
     """
 
     bloaty_tsv = bloat.memory_regions_size_report(
-        elf, additional_data_sources=data_sources, extra_args=('--tsv',)
+        elf, data_sources=data_sources, extra_args=('--tsv',)
     )
 
     return DataSourceMap.from_bloaty_tsv(bloaty_tsv)
diff --git a/pw_bloat/py/pw_bloat/bloat.py b/pw_bloat/py/pw_bloat/bloat.py
index 0bc5b01..e821e93 100755
--- a/pw_bloat/py/pw_bloat/bloat.py
+++ b/pw_bloat/py/pw_bloat/bloat.py
@@ -116,15 +116,14 @@
 
 def memory_regions_size_report(
     elf: Path,
-    additional_data_sources: Iterable[str] = (),
+    data_sources: Iterable[str] = (),
     extra_args: Iterable[str] = (),
 ) -> Iterable[str]:
     """Runs a size report on an ELF file using pw_bloat memory region symbols.
 
     Arguments:
         elf: The ELF binary on which to run.
-        additional_data_sources: Optional hierarchical data sources to display
-            following the root memory regions.
+        data_sources: Hierarchical data sources to display.
         extra_args: Additional command line arguments forwarded to bloaty.
 
     Returns:
@@ -151,7 +150,7 @@
             run_bloaty(
                 str(elf.resolve()),
                 bloaty_config.name,
-                data_sources=('memoryregions', *additional_data_sources),
+                data_sources=data_sources,
                 extra_args=extra_args,
             )
             .decode('utf-8')