diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index b6c1fe4bf7..bbec3070ae 100644
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -574,6 +574,9 @@ long wxExecute(wxChar **argv,
     {
         ARGS_CLEANUP;
 
+        // save it for WaitForChild() use
+        execData.pid = pid;
+
         // prepare for IO redirection
 
 #if wxUSE_STREAMS