diff --git a/gisi/iter.c b/gisi/iter.c
index e2d8d271..98825a6b 100644
--- a/gisi/iter.c
+++ b/gisi/iter.c
@@ -47,7 +47,7 @@ static inline void bcd_to_mccmnc(const uint8_t *bcd, char *mcc, char *mnc)
 	mnc[3] = '\0';
 }
 
-bool g_isi_sb_iter_init(const void restrict *data, size_t len,
+bool g_isi_sb_iter_init(const void *restrict data, size_t len,
 			GIsiSubBlockIter *iter, bool longhdr)
 {
 	if (!iter || !data || len == 0)
diff --git a/gisi/iter.h b/gisi/iter.h
index c769c050..7a854172 100644
--- a/gisi/iter.h
+++ b/gisi/iter.h
@@ -38,7 +38,7 @@ struct _GIsiSubBlockIter {
 };
 typedef struct _GIsiSubBlockIter GIsiSubBlockIter;
 
-bool g_isi_sb_iter_init(const void restrict *data, size_t len,
+bool g_isi_sb_iter_init(const void *restrict data, size_t len,
 			GIsiSubBlockIter *iter, bool longhdr);
 bool g_isi_sb_iter_is_valid(GIsiSubBlockIter *iter);
 bool g_isi_sb_iter_next(GIsiSubBlockIter *iter);