diff --git a/Makefile b/Makefile
index e17ddd2bf..ab718678d 100644
--- a/Makefile
+++ b/Makefile
@@ -35,6 +35,7 @@ clean-test:
 	rm -fr .tox/
 	rm -f .coverage
 	rm -fr htmlcov/
+	rm -fr result_images/*
 
 lint:
 	flake8 plotnine
diff --git a/doc/changelog.rst b/doc/changelog.rst
index 3f309f83e..74658df32 100644
--- a/doc/changelog.rst
+++ b/doc/changelog.rst
@@ -14,6 +14,10 @@ v0.1.1
 - Fixed exceptions when using :func:`pandas.pivot_table` for Pandas v0.20.0.
   The API was `fixed <http://pandas.pydata.org/pandas-docs/version/0.20/whatsnew.html#pivot-table-always-returns-a-dataframe>`_.
 
+- Fixed issues where lines/paths with segments that all belonged in the
+  same group had joins that in some cases were "butted".
+
+
 API Changes
 ***********
 
diff --git a/plotnine/geoms/geom_path.py b/plotnine/geoms/geom_path.py
index 41642b101..bbd26c575 100644
--- a/plotnine/geoms/geom_path.py
+++ b/plotnine/geoms/geom_path.py
@@ -102,7 +102,7 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
         cols = {'color', 'size', 'linetype', 'alpha', 'group'}
         cols = cols & set(data.columns)
         df = data.drop_duplicates(cols)
-        constant = len(df) == len(data['group'].unique())
+        constant = len(df) == data['group'].nunique()
         params['constant'] = constant
 
         if not constant:
@@ -117,7 +117,7 @@ def draw_panel(self, data, panel_params, coord, ax, **params):
     def draw_group(data, panel_params, coord, ax, **params):
         data = coord.transform(data, panel_params, munch=True)
         data['size'] *= SIZE_FACTOR
-        constant = params.pop('constant', False)
+        constant = params.pop('constant', data['group'].nunique() == 1)
 
         if not constant:
             _draw_segments(data, ax, **params)
diff --git a/plotnine/tests/baseline_images/test_geom_path_line_step/path_line_step.png b/plotnine/tests/baseline_images/test_geom_path_line_step/path_line_step.png
index 561dfd50d..88c610dee 100644
Binary files a/plotnine/tests/baseline_images/test_geom_path_line_step/path_line_step.png and b/plotnine/tests/baseline_images/test_geom_path_line_step/path_line_step.png differ
diff --git a/plotnine/tests/baseline_images/test_geom_path_line_step/step.png b/plotnine/tests/baseline_images/test_geom_path_line_step/step.png
index 93559e166..be3ee3674 100644
Binary files a/plotnine/tests/baseline_images/test_geom_path_line_step/step.png and b/plotnine/tests/baseline_images/test_geom_path_line_step/step.png differ
diff --git a/plotnine/tests/baseline_images/test_stat_ecdf/ecdf.png b/plotnine/tests/baseline_images/test_stat_ecdf/ecdf.png
index f059c0a15..ecd30a0e0 100644
Binary files a/plotnine/tests/baseline_images/test_stat_ecdf/ecdf.png and b/plotnine/tests/baseline_images/test_stat_ecdf/ecdf.png differ