diff --git a/crypto/ec/ecp_nistp224.c b/crypto/ec/ecp_nistp224.c
index 0d0022dcbc812f3ad0369905448c8ea50fd765b2..7fda43f579d9d4334e4a439698a2ebfd5b1fa026 100644
--- a/crypto/ec/ecp_nistp224.c
+++ b/crypto/ec/ecp_nistp224.c
@@ -700,7 +700,7 @@ static limb felem_is_zero(const felem in)
     return (zero | two224m96p1 | two225m97p2);
 }
 
-static limb felem_is_zero_int(const felem in)
+static int felem_is_zero_int(const void *in)
 {
     return (int)(felem_is_zero(in) & ((limb) 1));
 }
@@ -1366,7 +1366,6 @@ static void make_points_affine(size_t num, felem points[ /* num */ ][3],
                                              sizeof(felem),
                                              tmp_felems,
                                              (void (*)(void *))felem_one,
-                                             (int (*)(const void *))
                                              felem_is_zero_int,
                                              (void (*)(void *, const void *))
                                              felem_assign,
diff --git a/crypto/ec/ecp_nistp256.c b/crypto/ec/ecp_nistp256.c
index 707d1b5ab0ee60dd21d18d7b2561602e94a01f14..3bfc37aa7db4580de262686b068532589fbb4f90 100644
--- a/crypto/ec/ecp_nistp256.c
+++ b/crypto/ec/ecp_nistp256.c
@@ -979,7 +979,7 @@ static limb smallfelem_is_zero(const smallfelem small)
     return result;
 }
 
-static int smallfelem_is_zero_int(const smallfelem small)
+static int smallfelem_is_zero_int(const void *small)
 {
     return (int)(smallfelem_is_zero(small) & ((limb) 1));
 }
@@ -1984,7 +1984,6 @@ static void make_points_affine(size_t num, smallfelem points[][3],
                                              sizeof(smallfelem),
                                              tmp_smallfelems,
                                              (void (*)(void *))smallfelem_one,
-                                             (int (*)(const void *))
                                              smallfelem_is_zero_int,
                                              (void (*)(void *, const void *))
                                              smallfelem_assign,
diff --git a/crypto/ec/ecp_nistp521.c b/crypto/ec/ecp_nistp521.c
index e1e812d97a5d24535e27bea01e9d8f8f9829a65f..e491fe55c2b41784dc0205c98802924e44f97c47 100644
--- a/crypto/ec/ecp_nistp521.c
+++ b/crypto/ec/ecp_nistp521.c
@@ -886,7 +886,7 @@ static limb felem_is_zero(const felem in)
     return is_zero;
 }
 
-static int felem_is_zero_int(const felem in)
+static int felem_is_zero_int(const void *in)
 {
     return (int)(felem_is_zero(in) & ((limb) 1));
 }
@@ -1806,7 +1806,6 @@ static void make_points_affine(size_t num, felem points[][3],
                                              sizeof(felem),
                                              tmp_felems,
                                              (void (*)(void *))felem_one,
-                                             (int (*)(const void *))
                                              felem_is_zero_int,
                                              (void (*)(void *, const void *))
                                              felem_assign,