diff --git a/examples/ml/ml_example.ml b/examples/ml/ml_example.ml
index 6fd795476..5b4e6e9ed 100644
--- a/examples/ml/ml_example.ml
+++ b/examples/ml/ml_example.ml
@@ -30,11 +30,11 @@ let  model_converter_test ( ctx : context ) =
   let xr = (Expr.mk_const ctx (Symbol.mk_string ctx "x") (Real.mk_sort ctx)) in
   let yr = (Expr.mk_const ctx (Symbol.mk_string ctx "y") (Real.mk_sort ctx)) in
   let g4 = (mk_goal ctx true false false ) in
-  (Goal.add g4 [ (mk_gt ctx xr (Real.mk_numeral_nd ctx 10L 1L)) ]) ;
+  (Goal.add g4 [ (mk_gt ctx xr (Real.mk_numeral_nd ctx 10 1)) ]) ;
   (Goal.add g4 [ (mk_eq ctx 
 			 yr
-			 (Arithmetic.mk_add ctx [ xr; (Real.mk_numeral_nd ctx 1L 1L)  ])) ]) ;
-  (Goal.add g4 [ (mk_gt ctx yr (Real.mk_numeral_nd ctx 1L 1L)) ]) ;
+			 (Arithmetic.mk_add ctx [ xr; (Real.mk_numeral_nd ctx 1 1)  ])) ]) ;
+  (Goal.add g4 [ (mk_gt ctx yr (Real.mk_numeral_nd ctx 1 1)) ]) ;
   (
     let  ar = (Tactic.apply (mk_tactic ctx "simplify") g4 None) in
     if ((get_num_subgoals ar) == 1 && 
@@ -163,7 +163,7 @@ let basic_tests ( ctx : context ) =
   ) ;
   model_converter_test ctx ;
   (* Real num/den test. *)
-  let rn = Real.mk_numeral_nd ctx 42L 43L in
+  let rn = Real.mk_numeral_nd ctx 42 43 in
   let inum = (get_numerator rn) in
   let iden = get_denominator rn in
   Printf.printf "Numerator: %s Denominator: %s\n" (Real.numeral_to_string inum) (Real.numeral_to_string iden) ;
diff --git a/src/api/api_arith.cpp b/src/api/api_arith.cpp
index c0d599de7..7cfd5a345 100644
--- a/src/api/api_arith.cpp
+++ b/src/api/api_arith.cpp
@@ -48,7 +48,21 @@ extern "C" {
         Z3_CATCH_RETURN(nullptr);
     }
 
-    Z3_ast Z3_API Z3_mk_real(Z3_context c, int64_t num, int64_t den) {
+    Z3_ast Z3_API Z3_mk_real_int64(Z3_context c, int64_t num, int64_t den) {
+        Z3_TRY;
+        LOG_Z3_mk_real_int64(c, num, den);
+        RESET_ERROR_CODE();
+        if (den == 0) {
+            SET_ERROR_CODE(Z3_INVALID_ARG, nullptr);
+            RETURN_Z3(nullptr);
+        }
+        sort* s = mk_c(c)->m().mk_sort(mk_c(c)->get_arith_fid(), REAL_SORT);
+        ast* a = mk_c(c)->mk_numeral_core(rational(num, rational::i64())/rational(den, rational::i64()), s);
+        RETURN_Z3(of_ast(a));
+        Z3_CATCH_RETURN(nullptr);
+    }
+
+    Z3_ast Z3_API Z3_mk_real(Z3_context c, int num, int den) {
         Z3_TRY;
         LOG_Z3_mk_real(c, num, den);
         RESET_ERROR_CODE();
@@ -57,7 +71,7 @@ extern "C" {
             RETURN_Z3(nullptr);
         }
         sort* s = mk_c(c)->m().mk_sort(mk_c(c)->get_arith_fid(), REAL_SORT);
-        ast* a = mk_c(c)->mk_numeral_core(rational(num, rational::i64())/rational(den, rational::i64()), s);
+        ast* a = mk_c(c)->mk_numeral_core(rational(num, den), s);
         RETURN_Z3(of_ast(a));
         Z3_CATCH_RETURN(nullptr);
     }
diff --git a/src/api/c++/z3++.h b/src/api/c++/z3++.h
index 9d4ddcfb4..3f47b6637 100644
--- a/src/api/c++/z3++.h
+++ b/src/api/c++/z3++.h
@@ -3630,7 +3630,7 @@ namespace z3 {
     inline expr context::int_val(uint64_t n) { Z3_ast r = Z3_mk_unsigned_int64(m_ctx, n, int_sort()); check_error(); return expr(*this, r); }
     inline expr context::int_val(char const * n) { Z3_ast r = Z3_mk_numeral(m_ctx, n, int_sort()); check_error(); return expr(*this, r); }
 
-    inline expr context::real_val(int64_t n, int64_t d) { Z3_ast r = Z3_mk_real(m_ctx, n, d); check_error(); return expr(*this, r); }
+    inline expr context::real_val(int64_t n, int64_t d) { Z3_ast r = Z3_mk_real_int64(m_ctx, n, d); check_error(); return expr(*this, r); }
     inline expr context::real_val(int n) { Z3_ast r = Z3_mk_int(m_ctx, n, real_sort()); check_error(); return expr(*this, r); }
     inline expr context::real_val(unsigned n) { Z3_ast r = Z3_mk_unsigned_int(m_ctx, n, real_sort()); check_error(); return expr(*this, r); }
     inline expr context::real_val(int64_t n) { Z3_ast r = Z3_mk_int64(m_ctx, n, real_sort()); check_error(); return expr(*this, r); }
diff --git a/src/api/ml/z3.ml b/src/api/ml/z3.ml
index c271f60cf..2fa4acc65 100644
--- a/src/api/ml/z3.ml
+++ b/src/api/ml/z3.ml
@@ -1092,7 +1092,13 @@ struct
     let numeral_to_string (x:expr) = Z3native.get_numeral_string (Expr.gc x) x
     let mk_const (ctx:context) (name:Symbol.symbol) = Expr.mk_const ctx name (mk_sort ctx)
     let mk_const_s (ctx:context) (name:string) = mk_const ctx (Symbol.mk_string ctx name)
-    let mk_numeral_nd (ctx:context) (num:int64) (den:int64) = Z3native.mk_real ctx num den
+    let mk_numeral_nd (ctx:context) (num:int) (den:int) =
+      if den = 0 then
+        raise (Error "Denominator is zero")
+      else if not (check_int32 num) || not (check_int32 den) then
+        raise (Error "numerals don't fit in 32 bits")
+      else
+        Z3native.mk_real ctx num den
 
     let mk_numeral_s (ctx:context) (v:string) = Z3native.mk_numeral ctx v (mk_sort ctx)
     let mk_numeral_i (ctx:context) (v:int) = mk_int_expr ctx v (mk_sort ctx)
diff --git a/src/api/ml/z3.mli b/src/api/ml/z3.mli
index cb61bee68..b7fa27b5e 100644
--- a/src/api/ml/z3.mli
+++ b/src/api/ml/z3.mli
@@ -1264,7 +1264,7 @@ sig
     (** Create a real numeral from a fraction.
         @return A Term with rational value and sort Real
         {!mk_numeral_s} *)
-    val mk_numeral_nd : context -> int64 -> int64 -> Expr.expr
+    val mk_numeral_nd : context -> int -> int -> Expr.expr
 
     (** Create a real numeral.
         @return A Term with the given value and sort Real *)
diff --git a/src/api/z3_api.h b/src/api/z3_api.h
index fd85dd781..88aaa8938 100644
--- a/src/api/z3_api.h
+++ b/src/api/z3_api.h
@@ -3417,11 +3417,21 @@ extern "C" {
 
        \sa Z3_mk_numeral
        \sa Z3_mk_int
+       \sa Z3_mk_real_int64
        \sa Z3_mk_unsigned_int
 
-       def_API('Z3_mk_real', AST, (_in(CONTEXT), _in(INT64), _in(INT64)))
+       def_API('Z3_mk_real', AST, (_in(CONTEXT), _in(INT), _in(INT)))
     */
-    Z3_ast Z3_API Z3_mk_real(Z3_context c, int64_t num, int64_t den);
+    Z3_ast Z3_API Z3_mk_real(Z3_context c, int num, int den);
+
+    /**
+       \brief Create a real from a fraction of int64.
+
+       \sa Z3_mk_real
+       def_API('Z3_mk_real_int64', AST, (_in(CONTEXT), _in(INT64), _in(INT64)))
+     */
+
+    Z3_ast Z3_API Z3_mk_real_int64(Z3_context c, int64_t num, int64_t den);
 
     /**
        \brief Create a numeral of an int, bit-vector, or finite-domain sort.