diff --git a/pn_auth.c b/pn_auth.c
index c379efb..e8c92ce 100644
--- a/pn_auth.c
+++ b/pn_auth.c
@@ -31,6 +31,10 @@
 #include <stdlib.h> /* for atoi */
 #include <stdio.h>
 
+#ifdef __MINGW32__
+__MINGW_IMPORT long timezone;
+#endif
+
 typedef struct AuthRequest AuthRequest;
 
 struct AuthRequest
diff --git a/pn_util.c b/pn_util.c
index 7eb78c8..e47bfb5 100644
--- a/pn_util.c
+++ b/pn_util.c
@@ -35,6 +35,10 @@
 #define BUFSIZE 256
 #endif /* HAVE_LIBPURPLE */
 
+#ifdef __MINGW32__
+__MINGW_IMPORT long timezone;
+#endif
+
 struct PlusTag
 {
     char *code;