diff --git a/doc/nep/output_files/stress_out.rst b/doc/nep/output_files/stress_out.rst
index 1ecc0012e..219fda7c4 100644
--- a/doc/nep/output_files/stress_out.rst
+++ b/doc/nep/output_files/stress_out.rst
@@ -14,6 +14,6 @@ There are 12 columns.
 The first 6 columns give the :math:`xx`, :math:`yy`, :math:`zz`, :math:`xy`, :math:`yz`, and :math:`zx` stress components calculated using the :term:`NEP` model.
 The last 6 columns give the corresponding target stress components.
 
-For a structure without target virial or stress, a target value of -1e-6 will be output to remind the user about this.
+For a structure without target virial or stress, a target value of -1e6 will be output to remind the user about this.
 
 The stress values are in units of GPa.
diff --git a/doc/nep/output_files/virial_out.rst b/doc/nep/output_files/virial_out.rst
index 1336ba5c3..711b18887 100644
--- a/doc/nep/output_files/virial_out.rst
+++ b/doc/nep/output_files/virial_out.rst
@@ -14,6 +14,6 @@ There are 12 columns.
 The first 6 columns give the :math:`xx`, :math:`yy`, :math:`zz`, :math:`xy`, :math:`yz`, and :math:`zx` virial components calculated using the :term:`NEP` model.
 The last 6 columns give the corresponding target virials.
 
-For a structure without target virial or stress, a target value of -1e-6 will be output to remind the user about this.
+For a structure without target virial or stress, a target value of -1e6 will be output to remind the user about this.
 
 The virial values are in units of eV/atom.