diff -Nurd dssp-2.2.1.orig/src/dssp.cpp dssp-2.2.1/src/dssp.cpp
--- dssp-2.2.1.orig/src/dssp.cpp	2013-09-11 02:33:28.000000000 -0400
+++ dssp-2.2.1/src/dssp.cpp	2021-06-30 22:47:10.000000000 -0400
@@ -73,7 +73,7 @@
 
 	double alpha;
 	char chirality;
-	tr1::tie(alpha,chirality) = residue.Alpha();
+	boost::tie(alpha,chirality) = residue.Alpha();
 	
 	uint32 bp[2] = {};
 	char bridgelabel[2] = { ' ', ' ' };
diff -Nurd dssp-2.2.1.orig/src/primitives-3d.cpp dssp-2.2.1/src/primitives-3d.cpp
--- dssp-2.2.1.orig/src/primitives-3d.cpp	2013-09-11 02:33:28.000000000 -0400
+++ dssp-2.2.1/src/primitives-3d.cpp	2021-06-30 22:48:38.000000000 -0400
@@ -153,7 +153,7 @@
 
 // --------------------------------------------------------------------
 
-tr1::tuple<double,MPoint> QuaternionToAngleAxis(MQuaternion q)
+boost::tuple<double,MPoint> QuaternionToAngleAxis(MQuaternion q)
 {
 	if (q.R_component_1() > 1)
 		q = Normalize(q);
@@ -169,7 +169,7 @@
 	
 	MPoint axis(q.R_component_2() / s, q.R_component_3() / s, q.R_component_4() / s);
 
-	return tr1::make_tuple(angle, axis);
+	return boost::make_tuple(angle, axis);
 }
 
 MPoint CenterPoints(vector<MPoint>& points)
diff -Nurd dssp-2.2.1.orig/src/primitives-3d.h dssp-2.2.1/src/primitives-3d.h
--- dssp-2.2.1.orig/src/primitives-3d.h	2013-09-11 02:33:28.000000000 -0400
+++ dssp-2.2.1/src/primitives-3d.h	2021-06-30 22:46:46.000000000 -0400
@@ -9,7 +9,7 @@
 
 #include <vector>
 
-#include <boost/tr1/tuple.hpp>
+#include <boost/tuple/tuple.hpp>
 #include <boost/math/quaternion.hpp>
 
 typedef boost::math::quaternion<double> MQuaternion;
@@ -64,7 +64,7 @@
 
 MQuaternion Normalize(MQuaternion q);
 
-std::tr1::tuple<double,MPoint> QuaternionToAngleAxis(MQuaternion q);
+boost::tuple<double,MPoint> QuaternionToAngleAxis(MQuaternion q);
 MPoint Centroid(std::vector<MPoint>& points);
 MPoint CenterPoints(std::vector<MPoint>& points);
 MQuaternion AlignPoints(const std::vector<MPoint>& a, const std::vector<MPoint>& b);
diff -Nurd dssp-2.2.1.orig/src/structure.cpp dssp-2.2.1/src/structure.cpp
--- dssp-2.2.1.orig/src/structure.cpp	2013-09-11 02:33:28.000000000 -0400
+++ dssp-2.2.1/src/structure.cpp	2021-06-30 22:41:54.000000000 -0400
@@ -544,7 +544,7 @@
 	return result;
 }
 
-tr1::tuple<double,char> MResidue::Alpha() const
+boost::tuple<double,char> MResidue::Alpha() const
 {
 	double alhpa = 360;
 	char chirality = ' ';
@@ -558,7 +558,7 @@
 		else
 			chirality = '+';
 	}
-	return tr1::make_tuple(alhpa, chirality);
+	return boost::make_tuple(alhpa, chirality);
 }
 
 double MResidue::Kappa() const
diff -Nurd dssp-2.2.1.orig/src/structure.h dssp-2.2.1/src/structure.h
--- dssp-2.2.1.orig/src/structure.h	2013-09-11 02:33:28.000000000 -0400
+++ dssp-2.2.1/src/structure.h	2021-06-30 22:42:18.000000000 -0400
@@ -168,7 +168,7 @@
 
 	double				Phi() const;
 	double				Psi() const;
-	std::tr1::tuple<double,char>
+	boost::tuple<double,char>
 						Alpha() const;
 	double				Kappa() const;
 	double				TCO() const;