diff --git a/gerber/gerber_statements.py b/gerber/gerber_statements.py
index 3419948..d84b5e0 100644
--- a/gerber/gerber_statements.py
+++ b/gerber/gerber_statements.py
@@ -281,7 +281,7 @@ class ADParamStmt(ParamStmt):
         elif self.shape == 'R':
             shape = 'rectangle'
         elif self.shape == 'O':
-            shape = 'oblong'
+            shape = 'obround'
         else:
             shape = self.shape
 
diff --git a/gerber/rs274x.py b/gerber/rs274x.py
index 2e5a3ec..abd7366 100644
--- a/gerber/rs274x.py
+++ b/gerber/rs274x.py
@@ -113,6 +113,7 @@ class GerberFile(CamFile):
                 f.write("\n")
 
 
+
 class GerberParser(object):
     """ GerberParser
     """
@@ -156,6 +157,7 @@ class GerberParser(object):
 
     APERTURE_STMT = re.compile(r"(?P<deprecated>(G54)|G55)?D(?P<d>\d+)\*")
 
+
     COMMENT_STMT = re.compile(r"G04(?P<comment>[^*]*)(\*)?")
 
     EOF_STMT = re.compile(r"(?P<eof>M02)\*")
diff --git a/gerber/tests/test_gerber_statements.py b/gerber/tests/test_gerber_statements.py
index c346ace..ff967f9 100644
--- a/gerber/tests/test_gerber_statements.py
+++ b/gerber/tests/test_gerber_statements.py
@@ -411,4 +411,4 @@ def test_ADParamStmt_string():
 
     stmt = {'param': 'AD', 'd': 2, 'shape': 'O'}
     ad = ADParamStmt.from_dict(stmt)
-    assert_equal(str(ad), '<Aperture Definition: 2: obround')
+    assert_equal(str(ad), '<Aperture Definition: 2: obround>')