diff --git a/libsrc/core/array.hpp b/libsrc/core/array.hpp
index 90018182..9e57d174 100644
--- a/libsrc/core/array.hpp
+++ b/libsrc/core/array.hpp
@@ -294,7 +294,7 @@ namespace ngcore
     NETGEN_INLINE ArrayRangeIterator<T> begin() const { return first; }
     NETGEN_INLINE ArrayRangeIterator<T> end() const { return next; }
 
-    T_Range Split (size_t nr, int tot) const
+    NETGEN_INLINE T_Range Split (size_t nr, int tot) const
     {
       T diff = next-first;
       return T_Range (first + nr * diff / tot,