diff --git a/ext/libelf/SConscript b/ext/libelf/SConscript
index f3dbe6ae7b..a5f3569c9d 100644
--- a/ext/libelf/SConscript
+++ b/ext/libelf/SConscript
@@ -116,6 +116,9 @@ if not SCons.Tool.m4.exists(m4env):
          "Please install M4 and try again.")
    Exit(1)
 
+# Setup m4 tool
+m4env.Tool('m4')
+
 m4env.Append(M4FLAGS=['-DSRCDIR=%s' % Dir('.').path])
 m4env['M4COM'] = '$M4 $M4FLAGS $SOURCES > $TARGET'
 m4env.M4(target=File('libelf_convert.c'),