diff --git a/src/grib_accessor_class_optimal_step_units.cc b/src/grib_accessor_class_optimal_step_units.cc
index 261ff4c80..79f4c1dcf 100644
--- a/src/grib_accessor_class_optimal_step_units.cc
+++ b/src/grib_accessor_class_optimal_step_units.cc
@@ -171,7 +171,6 @@ static int pack_expression(grib_accessor* a, grib_expression* e)
 }
 
 static long staticStepUnits = eccodes::Unit{eccodes::Unit::Value::MISSING}.value<long>();
-static long staticForceStepUnits = eccodes::Unit{eccodes::Unit::Value::MISSING}.value<long>();
 
 static int pack_long(grib_accessor* a, const long* val, size_t* len)
 {