diff --git a/include/medium/dim2/elastic/anisotropic/stress_integrand.tpp b/include/medium/dim2/elastic/anisotropic/stress_integrand.tpp
index 6ee401cc..3773c126 100644
--- a/include/medium/dim2/elastic/anisotropic/stress_integrand.tpp
+++ b/include/medium/dim2/elastic/anisotropic/stress_integrand.tpp
@@ -1,5 +1,4 @@
 #pragma once
-#pragma once
 
 #include "stress_integrand.hpp"