diff --git a/tools/binman/elf.py b/tools/binman/elf.py
index d22a0d4..47e0a3f 100644
--- a/tools/binman/elf.py
+++ b/tools/binman/elf.py
@@ -285,7 +285,7 @@
     cc, args = tools.get_target_compile_tool('cc')
     args += ['-static', '-nostdlib', '-Wl,--build-id=none', '-m32', '-T',
             lds_file, '-o', elf_fname, s_file]
-    stdout = command.Output(cc, *args)
+    stdout = command.output(cc, *args)
     shutil.rmtree(outdir)
 
 def DecodeElf(data, location):