diff --git a/doc/src/fix_adapt.rst b/doc/src/fix_adapt.rst
index 0f68219358..1276adf444 100644
--- a/doc/src/fix_adapt.rst
+++ b/doc/src/fix_adapt.rst
@@ -297,17 +297,17 @@ means all types from 1 to N.  A leading asterisk means all types from
 (inclusive).
 
 Currently *bond* does not support bond_style hybrid nor bond_style
-hybrid/overlay as bond styles. The only bonds that currently are
-working with fix_adapt are
+hybrid/overlay as bond styles. The bond styles that currently work
+with fix_adapt are
 
 +------------------------------------+-------+-----------------+
 | :doc:`class2 <bond_class2>`        | r0         | type bonds |
 +------------------------------------+-------+-----------------+
-| :doc:`fene <bond_fene>`            | k, r0      | type bonds |
+| :doc:`fene <bond_fene>`            | k,r0       | type bonds |
 +------------------------------------+-------+-----------------+
-| :doc:`fene/nm <bond_fene_nm>`      | k, r0      | type bonds |
+| :doc:`fene/nm <bond_fene_nm>`      | k,r0       | type bonds |
 +------------------------------------+-------+-----------------+
-| :doc:`gromos <bond_gromos>`        | k, r0      | type bonds |
+| :doc:`gromos <bond_gromos>`        | k,r0       | type bonds |
 +------------------------------------+-------+-----------------+
 | :doc:`harmonic <bond_harmonic>`    | k,r0       | type bonds |
 +------------------------------------+-------+-----------------+
@@ -333,12 +333,14 @@ means all types from 1 to N.  A leading asterisk means all types from
 (inclusive).
 
 Currently *angle* does not support angle_style hybrid nor angle_style
-hybrid/overlay as angle styles. The only angles that currently are
-working with fix_adapt are
+hybrid/overlay as angle styles. The angle styles that currently work
+with fix_adapt are
 
 +------------------------------------+-------+-----------------+
 | :doc:`harmonic <angle_harmonic>`    | k,theta0 | type angles |
 +------------------------------------+-------+-----------------+
+| :doc:`cosine <angle_cosine>`        | k        | type angles |
++------------------------------------+-------+-----------------+
 
 Note that internally, theta0 is stored in radians, so the variable
 this fix uses to reset theta0 needs to generate values in radians.
diff --git a/src/MOLECULE/angle_cosine.cpp b/src/MOLECULE/angle_cosine.cpp
index d32dc4559d..260ebc3948 100644
--- a/src/MOLECULE/angle_cosine.cpp
+++ b/src/MOLECULE/angle_cosine.cpp
@@ -234,3 +234,14 @@ double AngleCosine::single(int type, int i1, int i2, int i3)
 
   return k[type] * (1.0 + c);
 }
+
+/* ----------------------------------------------------------------------
+   return ptr to internal members upon request
+------------------------------------------------------------------------ */
+
+void *AngleCosine::extract(const char *str, int &dim)
+{
+  dim = 1;
+  if (strcmp(str, "k") == 0) return (void *) k;
+  return nullptr;
+}
diff --git a/src/MOLECULE/angle_cosine.h b/src/MOLECULE/angle_cosine.h
index 19b6222c87..e249e7a44c 100644
--- a/src/MOLECULE/angle_cosine.h
+++ b/src/MOLECULE/angle_cosine.h
@@ -35,6 +35,7 @@ class AngleCosine : public Angle {
   void read_restart(FILE *) override;
   void write_data(FILE *) override;
   double single(int, int, int, int) override;
+  void *extract(const char *, int &) override;
 
  protected:
   double *k;