diff --git a/src/pair_morse.cpp b/src/pair_morse.cpp
index a71ff45397..7c1b12d1e5 100644
--- a/src/pair_morse.cpp
+++ b/src/pair_morse.cpp
@@ -14,6 +14,7 @@
 #include "math.h"
 #include "stdio.h"
 #include "stdlib.h"
+#include "string.h"
 #include "pair_morse.h"
 #include "atom.h"
 #include "comm.h"
@@ -346,3 +347,14 @@ double PairMorse::single(int i, int j, int itype, int jtype, double rsq,
   phi = d0[itype][jtype] * (dexp*dexp - 2.0*dexp) - offset[itype][jtype];
   return factor_lj*phi;
 }
+
+/* ---------------------------------------------------------------------- */
+
+void *PairMorse::extract(const char *str, int &dim)
+{
+  dim = 2;
+  if (strcmp(str,"d") == 0) return (void *) d0;
+  if (strcmp(str,"r0") == 0) return (void *) r0;
+  if (strcmp(str,"alpha") == 0) return (void *) alpha;
+  return NULL;
+}
diff --git a/src/pair_morse.h b/src/pair_morse.h
index 72d0a59ae5..83cf3276e3 100644
--- a/src/pair_morse.h
+++ b/src/pair_morse.h
@@ -40,6 +40,7 @@ class PairMorse : public Pair {
   void write_data(FILE *);
   void write_data_all(FILE *);
   double single(int, int, int, int, double, double, double, double &);
+  void *extract(const char *, int &);
 
  protected:
   double cut_global;