diff --git a/xarray/backends/rasterio_.py b/xarray/backends/rasterio_.py
index 5821e45041a..b629eb51241 100644
--- a/xarray/backends/rasterio_.py
+++ b/xarray/backends/rasterio_.py
@@ -282,10 +282,10 @@ def open_rasterio(filename, parse_coordinates=None, chunks=None, cache=None,
         # CRS is a dict-like object specific to rasterio
         # If CRS is not None, we convert it back to a PROJ4 string using
         # rasterio itself
-    try:
-        attrs['crs'] = riods.crs.to_proj4()
-    except AttributeError:
-        attrs['crs'] = riods.crs.to_string()
+        try:
+            attrs['crs'] = riods.crs.to_proj4()
+        except AttributeError:
+            attrs['crs'] = riods.crs.to_string()
     if hasattr(riods, 'res'):
         # (width, height) tuple of pixels in units of CRS
         attrs['res'] = riods.res