diff --git a/miscmaths.h b/miscmaths.h
index 6becb3c78a974df0deb11fa71e262cd4643c5211..234dbbad5af1ec19f4369fa5424fde7396a7a98a 100644
--- a/miscmaths.h
+++ b/miscmaths.h
@@ -120,7 +120,6 @@ namespace MISCMATHS {
   double norm2sq(double a, double b, double c);
   float norm2sq(float a, float b, float c);
 
-  int Identity(Matrix& m);
   ColumnVector seq(const int num);
 
   int diag(Matrix& m, const float diagvals[]);