diff --git a/src/algebra/TinyVector.hpp b/src/algebra/TinyVector.hpp
index 0ce3812ed138e497d8098d0aabcf3c174ad4b705..d9661606be6b36cd40c882e529225d09241cdb41 100644
--- a/src/algebra/TinyVector.hpp
+++ b/src/algebra/TinyVector.hpp
@@ -4,6 +4,7 @@
 #include <cassert>
 #include <iostream>
 
+#include <Kokkos_Core.hpp>
 #include <Types.hpp>
 
 template <size_t N, typename T=double>
@@ -61,7 +62,7 @@ public:
     os << ')';
     return os;
   }
-  
+
   KOKKOS_INLINE_FUNCTION
   TinyVector operator+(const TinyVector& v) const
   {
@@ -169,7 +170,7 @@ public:
 
   KOKKOS_INLINE_FUNCTION
   TinyVector(TinyVector&& v) = default;
-  
+
   KOKKOS_INLINE_FUNCTION
   ~TinyVector()
   {