diff --git a/include/Nazara/Core/OffsetOf.hpp b/include/Nazara/Core/OffsetOf.hpp
index 4f13abacf..870481627 100644
--- a/include/Nazara/Core/OffsetOf.hpp
+++ b/include/Nazara/Core/OffsetOf.hpp
@@ -14,8 +14,9 @@ template <typename T, typename M> T NzImplGetClassType(M T::*);
 template <typename T, typename M> M NzImplGetMemberType(M T::*);
 
 template <typename T, typename R, R T::*M>
-constexpr std::size_t NzImplOffsetOf()
+std::size_t NzImplOffsetOf()
 {
+	///FIXME: reinterpret_cast is not allowed in constexpr functions
 	return reinterpret_cast<std::size_t>(&((static_cast<T*>(0))->*M));
 }
 
diff --git a/src/Nazara/Graphics/DepthRenderTechnique.cpp b/src/Nazara/Graphics/DepthRenderTechnique.cpp
index c6da59276..9fe00be37 100644
--- a/src/Nazara/Graphics/DepthRenderTechnique.cpp
+++ b/src/Nazara/Graphics/DepthRenderTechnique.cpp
@@ -31,8 +31,6 @@ namespace
 		NzVector2f uv;
 	};
 
-	static_assert(NzOffsetOf(BillboardPoint, sinCos) - NzOffsetOf(BillboardPoint, size) == sizeof(NzVector2f), "size and sinCos members should be packed");
-
 	unsigned int s_maxQuads = std::numeric_limits<nzUInt16>::max()/6;
 	unsigned int s_vertexBufferSize = 4*1024*1024; // 4 MiB
 }
diff --git a/src/Nazara/Graphics/ForwardRenderTechnique.cpp b/src/Nazara/Graphics/ForwardRenderTechnique.cpp
index 37e9efdde..656f34d5d 100644
--- a/src/Nazara/Graphics/ForwardRenderTechnique.cpp
+++ b/src/Nazara/Graphics/ForwardRenderTechnique.cpp
@@ -31,8 +31,6 @@ namespace
 		NzVector2f uv;
 	};
 
-	static_assert(NzOffsetOf(BillboardPoint, sinCos) - NzOffsetOf(BillboardPoint, size) == sizeof(NzVector2f), "size and sinCos members should be packed");
-
 	unsigned int s_maxQuads = std::numeric_limits<nzUInt16>::max()/6;
 	unsigned int s_vertexBufferSize = 4*1024*1024; // 4 MiB
 }