diff --git a/pytential/qbx/interactions.py b/pytential/qbx/interactions.py
index 0d78dcdb2d4562fbc5f1fc515434bdb9a6eea4ca..6105472db63a1aad41256798880ecef91e852c49 100644
--- a/pytential/qbx/interactions.py
+++ b/pytential/qbx/interactions.py
@@ -112,9 +112,9 @@ class P2QBXLFromCSR(P2EBase):
                 """],
                 arguments,
                 name=self.name, assumptions="ntgt_centers>=1",
-                silenced_warnings="write_race(write_expn*)")
+                silenced_warnings="write_race(write_expn*)",
+                fixed_parameters=dict(dim=self.dim))
 
-        loopy_knl = lp.fix_parameters(loopy_knl, dim=self.dim)
         loopy_knl = self.expansion.prepare_loopy_kernel(loopy_knl)
         loopy_knl = lp.tag_inames(loopy_knl, "idim*:unr")
 
@@ -208,9 +208,8 @@ class M2QBXL(E2EBase):
                     "..."
                 ] + gather_loopy_arguments([self.src_expansion, self.tgt_expansion]),
                 name=self.name, assumptions="ncenters>=1",
-                silenced_warnings="write_race(write_expn*)")
-
-        loopy_knl = lp.fix_parameters(loopy_knl, dim=self.dim)
+                silenced_warnings="write_race(write_expn*)",
+                fixed_parameters=dict(dim=self.dim))
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
@@ -309,11 +308,8 @@ class L2QBXL(E2EBase):
                 ] + gather_loopy_arguments([self.src_expansion, self.tgt_expansion]),
                 name=self.name,
                 assumptions="ncenters>=1",
-                silenced_warnings="write_race(write_expn*)")
-
-        loopy_knl = lp.fix_parameters(loopy_knl,
-                dim=self.dim,
-                nchildren=2**self.dim)
+                silenced_warnings="write_race(write_expn*)",
+                fixed_parameters=dict(dim=self.dim, nchildren=2**self.dim))
 
         for expn in [self.src_expansion, self.tgt_expansion]:
             loopy_knl = expn.prepare_loopy_kernel(loopy_knl)
@@ -408,11 +404,8 @@ class QBXL2P(E2PBase):
                 ] + [arg.loopy_arg for arg in self.expansion.get_args()],
                 name=self.name,
                 assumptions="nglobal_qbx_centers>=1",
-                silenced_warnings="write_race(write_result*)")
-
-        loopy_knl = lp.fix_parameters(loopy_knl,
-                dim=self.dim,
-                nresults=len(result_names))
+                silenced_warnings="write_race(write_result*)",
+                fixed_parameters=dict(dim=self.dim, nresults=len(result_names)))
 
         loopy_knl = lp.tag_inames(loopy_knl, "idim*:unr")
         loopy_knl = self.expansion.prepare_loopy_kernel(loopy_knl)
diff --git a/setup.py b/setup.py
index 52d84d347139cb3ac21df485e3b6c1add0bcb692..d8d49a9cb1d30b0ac134f308ce983cd8dee0e7b1 100644
--- a/setup.py
+++ b/setup.py
@@ -51,7 +51,7 @@ def main():
               "pyopencl>=2013.1",
               "boxtree>=2013.1",
               "pymbolic>=2013.2",
-              "loo.py>=2013.1beta",
+              "loo.py>=2017.2",
               "sumpy>=2013.1",
               "cgen>=2013.1.2",