diff --git a/docs/source/users_guide/natural_orbitals.rst b/docs/source/users_guide/natural_orbitals.rst
index 6cc402f6..41e9c3c1 100644
--- a/docs/source/users_guide/natural_orbitals.rst
+++ b/docs/source/users_guide/natural_orbitals.rst
@@ -18,7 +18,7 @@ Extracting natural orbitals
 
 Once obtained the near |FCI| wave function, one can obtain many         
 quantities related to it. One of these quantities are the natural       
-orbitals which have the propertiy of diagonalizing the one-body      
+orbitals which have the property of diagonalizing the one-body      
 density matrix:                                                       
 
    .. math::
diff --git a/man/natural_orbitals.1 b/man/natural_orbitals.1
index 4667be02..56185c52 100644
--- a/man/natural_orbitals.1
+++ b/man/natural_orbitals.1
@@ -50,7 +50,7 @@ function are invalidated as well.
 .sp
 Once obtained the near FCI wave function, one can obtain many
 quantities related to it. One of these quantities are the natural
-orbitals which have the propertiy of diagonalizing the one\-body
+orbitals which have the property of diagonalizing the one\-body
 density matrix:
 .INDENT 0.0
 .INDENT 3.5