diff --git a/winsup/cygwin/dcrt0.cc b/winsup/cygwin/dcrt0.cc
index 300b31c41c..fc682bbccf 100644
--- a/winsup/cygwin/dcrt0.cc
+++ b/winsup/cygwin/dcrt0.cc
@@ -530,7 +530,7 @@ get_cygwin_startup_info ()
   child_info *res = (child_info *) si.lpReserved2;
 
   if (si.cbReserved2 < EXEC_MAGIC_SIZE || !res
-      || res->intro != PROC_MAGIC_GENERIC || res->magic != CHILD_INFO_MAGIC)
+      || res->intro != PROC_MAGIC_GENERIC || res->magic != (CHILD_INFO_MAGIC ^ CYGWIN_VERSION_DLL_COMBINED))
     {
       strace.activate (false);
       res = NULL;
diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index fd3291c1bc..374ca32480 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -811,7 +811,7 @@ int child_info::retry_count = 0;
 child_info::child_info (unsigned in_cb, child_info_types chtype,
 			bool need_subproc_ready):
   msv_count (0), cb (in_cb), intro (PROC_MAGIC_GENERIC),
-  magic (CHILD_INFO_MAGIC), type (chtype), cygheap (::cygheap),
+  magic (CHILD_INFO_MAGIC ^ CYGWIN_VERSION_DLL_COMBINED), type (chtype), cygheap (::cygheap),
   cygheap_max (::cygheap_max), flag (0), retry (child_info::retry_count),
   rd_proc_pipe (NULL), wr_proc_pipe (NULL), sigmask (_my_tls.sigmask)
 {