diff --git a/examples/rfmip-clear-sky/compare-to-reference.py b/examples/rfmip-clear-sky/compare-to-reference.py
index de6cc05bf..3f7b0c629 100755
--- a/examples/rfmip-clear-sky/compare-to-reference.py
+++ b/examples/rfmip-clear-sky/compare-to-reference.py
@@ -37,6 +37,9 @@
 
     failed = False
     for v in variables:
+        if np.any(np.isnan(ref.variables[v].values)):
+            raise Exception(
+                v + ": some ref values are missing. Now that is strange.")
         if np.all(np.isnan(tst.variables[v].values)):
             raise Exception(
                 v + ": all test values are missing. Were the tests run?")
diff --git a/rrtmgp-kernels/mo_gas_optics_rrtmgp_kernels.F90 b/rrtmgp-kernels/mo_gas_optics_rrtmgp_kernels.F90
index 5dd61a297..fc6fceff3 100644
--- a/rrtmgp-kernels/mo_gas_optics_rrtmgp_kernels.F90
+++ b/rrtmgp-kernels/mo_gas_optics_rrtmgp_kernels.F90
@@ -72,7 +72,7 @@ subroutine interpolation( &
       !! use lower (or upper) atmosphere tables 
     integer,     dimension(2,    ncol,nlay,nflav), intent(out) :: jeta
       !! Index for binary species interpolation 
-#if !defined(__INTEL_LLVM_COMPILER) && __INTEL_COMPILER >= 2021
+#if !defined(__INTEL_LLVM_COMPILER) && __INTEL_COMPILER >= 1910
     ! A performance-hitting workaround for the vectorization problem reported in
     ! https://github.com/earth-system-radiation/rte-rrtmgp/issues/159
     ! The known affected compilers are Intel Fortran Compiler Classic