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-rw-r--r--c++/collision.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/c++/collision.hpp b/c++/collision.hpp
index c28ec21..d9eb2c0 100644
--- a/c++/collision.hpp
+++ b/c++/collision.hpp
@@ -50,7 +50,7 @@ public:
saw::data<T> rho;
saw::data<sch::FixedArray<T,Descriptor::D>> vel;
- compute_rho_u<T,Descriptor>(dfs,rho,vel);
+ compute_rho_u<T,Descriptor>(dfs_old,rho,vel);
auto eq = equilibrium<T,Descriptor>(rho,vel);
for(uint64_t i = 0u; i < Descriptor::Q; ++i){