diff --git a/glib/gspawn-win32-helper.c b/glib/gspawn-win32-helper.c
index 35b25905c..0dc56c0ee 100644
--- a/glib/gspawn-win32-helper.c
+++ b/glib/gspawn-win32-helper.c
@@ -80,8 +80,8 @@ protect_wargv (gint       argc,
     {
       wchar_t *p = wargv[i];
       wchar_t *q;
-      gint len = 0;
-      gint pre_bslash = 0;
+      size_t len = 0;
+      size_t pre_bslash = 0;
       gboolean need_dblquotes = FALSE;
       while (*p)
 	{
diff --git a/glib/gspawn-win32.c b/glib/gspawn-win32.c
index 96b8bafee..3a9a30868 100644
--- a/glib/gspawn-win32.c
+++ b/glib/gspawn-win32.c
@@ -253,8 +253,8 @@ protect_argv_string (const gchar *string)
 {
   const gchar *p = string;
   gchar *retval, *q;
-  gint len = 0;
-  gint pre_bslash = 0;
+  size_t len = 0;
+  size_t pre_bslash = 0;
   gboolean need_dblquotes = FALSE;
   while (*p)
     {