diff --git a/src/api/api_arith.cpp b/src/api/api_arith.cpp
index a79f55855..cc1ccf59e 100644
--- a/src/api/api_arith.cpp
+++ b/src/api/api_arith.cpp
@@ -121,7 +121,9 @@ extern "C" {
 
     Z3_bool Z3_API Z3_is_algebraic_number(Z3_context c, Z3_ast a) {
         LOG_Z3_is_algebraic_number(c, a);
-        return mk_c(c)->autil().is_irrational_algebraic_numeral(to_expr(a));
+        Z3_bool r = mk_c(c)->autil().is_irrational_algebraic_numeral(to_expr(a)) ? Z3_TRUE : Z3_FALSE;
+        IF_VERBOSE(10, verbose_stream() << r << "\n");
+        return r;
     }
 
     Z3_ast Z3_API Z3_get_algebraic_number_lower(Z3_context c, Z3_ast a, unsigned precision) {
diff --git a/src/api/dotnet/Expr.cs b/src/api/dotnet/Expr.cs
index 99745ffff..1e0f495f5 100644
--- a/src/api/dotnet/Expr.cs
+++ b/src/api/dotnet/Expr.cs
@@ -1822,7 +1822,7 @@ namespace Microsoft.Z3
             IntPtr s = Native.Z3_get_sort(ctx.nCtx, obj);
             Z3_sort_kind sk = (Z3_sort_kind)Native.Z3_get_sort_kind(ctx.nCtx, s);
 
-            if (Z3_sort_kind.Z3_REAL_SORT == sk && 
+            if ( // Z3_sort_kind.Z3_REAL_SORT == sk && 
                 Native.Z3_is_algebraic_number(ctx.nCtx, obj)) // is this a numeral ast?
                 return new AlgebraicNum(ctx, obj);