diff --git a/platform/build/make.inc.TUMBLEWEED b/platform/build/make.inc.TUMBLEWEED
index 19712de78..fd15f0dec 100644
--- a/platform/build/make.inc.TUMBLEWEED
+++ b/platform/build/make.inc.TUMBLEWEED
@@ -15,6 +15,7 @@ NUMAS_PER_NODE=1
 # Compilers
 
 FC     = mpifort -DDIMATCOPY -fallow-argument-mismatch -fall-intrinsics -fimplicit-none -J $(GACODE_ROOT)/modules #-fPIC
+#FC     = mpifort -DDIMATCOPY -DLANDAU_PREC16 -fallow-argument-mismatch -fall-intrinsics -fimplicit-none -J $(GACODE_ROOT)/modules #-fPIC
 #FC     = mpifort -std=f2008 -fall-intrinsics -fimplicit-none -J $(GACODE_ROOT)/modules #-fPIC
 F77    = mpifort -fimplicit-none -fallow-argument-mismatch
 FOMP   =-fopenmp