diff --git a/sumpy/e2e.py b/sumpy/e2e.py
index 20d8b3111b0509c2451423ab3e1820e6cb154686..2c309200f0ec83b40688802ba113798503d613d1 100644
--- a/sumpy/e2e.py
+++ b/sumpy/e2e.py
@@ -27,8 +27,9 @@ from six.moves import range
 
 import numpy as np
 import loopy as lp
-from loopy.version import MOST_RECENT_LANGUAGE_VERSION  # noqa
 import sumpy.symbolic as sym
+
+from loopy.version import MOST_RECENT_LANGUAGE_VERSION
 from sumpy.tools import KernelCacheWrapper
 
 import logging
@@ -218,7 +219,8 @@ class E2EFromCSR(E2EBase):
                 assumptions="ntgt_boxes>=1",
                 silenced_warnings="write_race(write_expn*)",
                 default_offset=lp.auto,
-                fixed_parameters=dict(dim=self.dim))
+                fixed_parameters=dict(dim=self.dim),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
@@ -337,7 +339,8 @@ class E2EFromChildren(E2EBase):
                 name=self.name,
                 assumptions="ntgt_boxes>=1",
                 silenced_warnings="write_race(write_expn*)",
-                fixed_parameters=dict(dim=self.dim, nchildren=2**self.dim))
+                fixed_parameters=dict(dim=self.dim, nchildren=2**self.dim),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
@@ -440,7 +443,8 @@ class E2EFromParent(E2EBase):
                 ] + gather_loopy_arguments([self.src_expansion, self.tgt_expansion]),
                 name=self.name, assumptions="ntgt_boxes>=1",
                 silenced_warnings="write_race(write_expn*)",
-                fixed_parameters=dict(dim=self.dim, nchildren=2**self.dim))
+                fixed_parameters=dict(dim=self.dim, nchildren=2**self.dim),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
diff --git a/sumpy/e2p.py b/sumpy/e2p.py
index 87ddbc2a3b4d40b41f40bc0a0f4cfad5551be124..d0d05cbf8c45e8d9f1c4552f784950bdfcab4bfb 100644
--- a/sumpy/e2p.py
+++ b/sumpy/e2p.py
@@ -27,9 +27,10 @@ from six.moves import range
 
 import numpy as np
 import loopy as lp
-from loopy.version import MOST_RECENT_LANGUAGE_VERSION  # noqa
 import sumpy.symbolic as sym
+
 from sumpy.tools import KernelCacheWrapper
+from loopy.version import MOST_RECENT_LANGUAGE_VERSION
 
 
 __doc__ = """
@@ -188,7 +189,8 @@ class E2PFromSingleBox(E2PBase):
                 assumptions="ntgt_boxes>=1",
                 silenced_warnings="write_race(write_result*)",
                 default_offset=lp.auto,
-                fixed_parameters=dict(dim=self.dim, nresults=len(result_names)))
+                fixed_parameters=dict(dim=self.dim, nresults=len(result_names)),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         loopy_knl = lp.tag_inames(loopy_knl, "idim*:unr")
         loopy_knl = self.expansion.prepare_loopy_kernel(loopy_knl)
@@ -295,7 +297,8 @@ class E2PFromCSR(E2PBase):
                 default_offset=lp.auto,
                 fixed_parameters=dict(
                     dim=self.dim,
-                    nresults=len(result_names)))
+                    nresults=len(result_names)),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         loopy_knl = lp.tag_inames(loopy_knl, "idim*:unr")
         loopy_knl = lp.prioritize_loops(loopy_knl, "itgt_box,itgt,isrc_box")
diff --git a/sumpy/p2e.py b/sumpy/p2e.py
index f3ea1c7292b03246d55b3387279b595ae76cf813..1d2e63a2dc9852444f89e1a4df185654d507990b 100644
--- a/sumpy/p2e.py
+++ b/sumpy/p2e.py
@@ -27,7 +27,8 @@ from six.moves import range
 
 import numpy as np
 import loopy as lp
-from loopy.version import MOST_RECENT_LANGUAGE_VERSION  # noqa
+
+from loopy.version import MOST_RECENT_LANGUAGE_VERSION
 from sumpy.tools import KernelCacheWrapper
 
 import logging
diff --git a/sumpy/qbx.py b/sumpy/qbx.py
index 8b5d94d06b2ef16d551aa949a10e10c9f660183e..cde20ef235ee2cd7f5b7dfdf57e30be2d4d8c20c 100644
--- a/sumpy/qbx.py
+++ b/sumpy/qbx.py
@@ -27,7 +27,7 @@ import six
 from six.moves import range, zip
 import numpy as np
 import loopy as lp
-from loopy.version import MOST_RECENT_LANGUAGE_VERSION  # noqa
+from loopy.version import MOST_RECENT_LANGUAGE_VERSION
 import sumpy.symbolic as sym
 from pytools import memoize_method
 from pymbolic import parse, var
@@ -181,7 +181,8 @@ class LayerPotentialBase(KernelComputation, KernelCacheWrapper):
                 assumptions="nsources>=1 and ntargets>=1",
                 default_offset=lp.auto,
                 silenced_warnings="write_race(write_lpot*)",
-                fixed_parameters=dict(dim=self.dim))
+                fixed_parameters=dict(dim=self.dim),
+                lang_version=MOST_RECENT_LANGUAGE_VERSION)
 
         loopy_knl = lp.tag_inames(loopy_knl, "idim*:unr")