diff --git a/acb.h b/acb.h
index 836ae340..76a8b042 100644
--- a/acb.h
+++ b/acb.h
@@ -1000,14 +1000,14 @@ void acb_randtest_param(acb_t z, flint_rand_t state, slong prec, slong mag_bits)
 
 slong acb_rel_error_bits(const acb_t x);
 
-ACB_INLINE long
+ACB_INLINE slong
 acb_rel_accuracy_bits(const acb_t x)
 {
     return -acb_rel_error_bits(x);
 }
 
 
-ACB_INLINE long
+ACB_INLINE slong
 acb_bits(const acb_t x)
 {
     slong b1, b2;
@@ -1036,7 +1036,7 @@ _acb_vec_is_real(acb_srcptr v, slong len)
     return 1;
 }
 
-ACB_INLINE long
+ACB_INLINE slong
 _acb_vec_bits(acb_srcptr vec, slong len)
 {
     return _arb_vec_bits((arb_srcptr) vec, 2 * len);
diff --git a/arb.h b/arb.h
index fa52f5d6..f38634a3 100644
--- a/arb.h
+++ b/arb.h
@@ -435,13 +435,13 @@ arb_get_abs_lbound_arf(arf_t u, const arb_t x, slong prec)
 
 slong arb_rel_error_bits(const arb_t x);
 
-ARB_INLINE long
+ARB_INLINE slong
 arb_rel_accuracy_bits(const arb_t x)
 {
     return -arb_rel_error_bits(x);
 }
 
-ARB_INLINE long
+ARB_INLINE slong
 arb_bits(const arb_t x)
 {
     return arf_bits(arb_midref(x));
@@ -881,7 +881,7 @@ _arb_vec_get_mag(mag_t bound, arb_srcptr vec, slong len)
     }
 }
 
-ARB_INLINE long
+ARB_INLINE slong
 _arb_vec_bits(arb_srcptr x, slong len)
 {
     slong i, b, c;
diff --git a/arb_poly.h b/arb_poly.h
index 7a76277c..979e55b1 100644
--- a/arb_poly.h
+++ b/arb_poly.h
@@ -652,7 +652,7 @@ n_zerobits(mp_limb_t e)
     return zeros;
 }
 
-ARB_POLY_INLINE long
+ARB_POLY_INLINE slong
 poly_pow_length(slong poly_len, ulong exp, slong trunc)
 {
     mp_limb_t hi, lo;
diff --git a/arf.h b/arf.h
index 90c34ea4..6f678343 100644
--- a/arf.h
+++ b/arf.h
@@ -649,7 +649,7 @@ arf_abs(arf_t y, const arf_t x)
         arf_set(y, x);
 }
 
-ARF_INLINE long
+ARF_INLINE slong
 arf_bits(const arf_t x)
 {
     if (arf_is_special(x))