diff --git a/doc/installing.rst b/doc/installing.rst
index 3ef16bcc8b..54d4b22c41 100644
--- a/doc/installing.rst
+++ b/doc/installing.rst
@@ -106,7 +106,7 @@ Instructions - Windows 10
    .. code:: bash
 
        cd %USERPROFILE%\Documents\hardware\esp8266com\esp8266
-       git submodules update --init   
+       git submodule update --init   
   
   If error messages about missing files related to ``SoftwareSerial`` are encountered during the build process, it should be because this step was missed and is required.
   
@@ -180,7 +180,7 @@ Instructions - Other OS
    .. code:: bash
 
        cd esp8266
-       git submodules update --init   
+       git submodule update --init   
   
   If error messages about missing files related to ``SoftwareSerial`` are encountered during the build process, it should be because this step was missed and is required.