diff --git a/developer/services/qrexec-internals.md b/developer/services/qrexec-internals.md
index bd8d74a8..864a38a5 100644
--- a/developer/services/qrexec-internals.md
+++ b/developer/services/qrexec-internals.md
@@ -82,6 +82,8 @@ Details of all possible use cases and the messages involved are described below.
 
 ### dom0: request execution of `some_command` in domX and pass stdin/stdout
 
+![qrexec basics diagram](/attachment/wiki/qrexec3/qrexec-internals-dom0.png)
+
 - **dom0**: `qrexec-client` is invoked in **dom0** as follows:
 
       qrexec-client -d domX [-l local_program] user:some_command`
@@ -117,6 +119,8 @@ Details of all possible use cases and the messages involved are described below.
 
 ### domY: invoke execution of qubes service `qubes.SomeRpc` in domX and pass stdin/stdout
 
+![qrexec basics diagram](/attachment/wiki/qrexec3/qrexec-internals-domY.png)
+
 - **domY**: `qrexec-client-vm` is invoked as follows:
 
       qrexec-client-vm domX qubes.SomeRpc local_program [params]