diff --git a/liboctave/eigs-base.cc b/liboctave/eigs-base.cc
--- a/liboctave/eigs-base.cc
+++ b/liboctave/eigs-base.cc
@@ -3833,43 +3833,43 @@
 #endif
 
 #ifndef _MSC_VER
-template static octave_idx_type
+template octave_idx_type
 lusolve (const SparseMatrix&, const SparseMatrix&, Matrix&);
 
-template static octave_idx_type
+template octave_idx_type
 lusolve (const SparseComplexMatrix&, const SparseComplexMatrix&,
          ComplexMatrix&);
 
-template static octave_idx_type
+template octave_idx_type
 lusolve (const Matrix&, const Matrix&, Matrix&);
 
-template static octave_idx_type
+template octave_idx_type
 lusolve (const ComplexMatrix&, const ComplexMatrix&, ComplexMatrix&);
 
-template static ComplexMatrix
+template ComplexMatrix
 ltsolve (const SparseComplexMatrix&, const ColumnVector&,
          const ComplexMatrix&);
 
-template static Matrix
+template Matrix
 ltsolve (const SparseMatrix&, const ColumnVector&, const Matrix&);
 
-template static ComplexMatrix
+template ComplexMatrix
 ltsolve (const ComplexMatrix&, const ColumnVector&, const ComplexMatrix&);
 
-template static Matrix
+template Matrix
 ltsolve (const Matrix&, const ColumnVector&, const Matrix&);
 
-template static ComplexMatrix
+template ComplexMatrix
 utsolve (const SparseComplexMatrix&, const ColumnVector&,
          const ComplexMatrix&);
 
-template static Matrix
+template Matrix
 utsolve (const SparseMatrix&, const ColumnVector&, const Matrix&);
 
-template static ComplexMatrix
+template ComplexMatrix
 utsolve (const ComplexMatrix&, const ColumnVector&, const ComplexMatrix&);
 
-template static Matrix
+template Matrix
 utsolve (const Matrix&, const ColumnVector&, const Matrix&);
 #endif
 
diff --git a/liboctave/oct-alloc.h b/liboctave/oct-alloc.h
--- a/liboctave/oct-alloc.h
+++ b/liboctave/oct-alloc.h
@@ -22,6 +22,7 @@
 
 #if !defined (octave_oct_alloc_h)
 #define octave_oct_alloc_h 1
+using std::size_t;
 
 #include <cstddef>