diff --git a/src/ChangeLog b/src/ChangeLog
index f98e1a3c..1cd86436 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2009-02-04  Werner Koch  <wk@g10code.com>
+
+	* w32-glib-io.c (_gpgme_io_spawn): Make ARGV argument const to
+	match prototype.
+	* w32-qt-io.cpp (_gpgme_io_spawn): Ditto.
+
 2009-02-03  Werner Koch  <wk@g10code.com>
 
 	* gpgme.h.in (struct _gpgme_subkey): Add fields IS_CARDKEY and
diff --git a/src/w32-glib-io.c b/src/w32-glib-io.c
index f4afc7e1..c646edcf 100644
--- a/src/w32-glib-io.c
+++ b/src/w32-glib-io.c
@@ -448,7 +448,7 @@ build_commandline (char **argv)
 
 
 int
-_gpgme_io_spawn (const char *path, char **argv,
+_gpgme_io_spawn (const char *path, char * const argv[],
 		 struct spawn_fd_item_s *fd_list, pid_t *r_pid)
 {
   SECURITY_ATTRIBUTES sec_attr;
diff --git a/src/w32-qt-io.cpp b/src/w32-qt-io.cpp
index 43f94fd1..681493ff 100644
--- a/src/w32-qt-io.cpp
+++ b/src/w32-qt-io.cpp
@@ -397,7 +397,7 @@ build_commandline (char **argv)
 
 
 int
-_gpgme_io_spawn (const char *path, char **argv,
+_gpgme_io_spawn (const char *path, char * const argv[],
 		 struct spawn_fd_item_s *fd_list, pid_t *r_pid)
 {
   SECURITY_ATTRIBUTES sec_attr;