diff --git a/src/api/python/z3/z3.py b/src/api/python/z3/z3.py
index 10198fcc5..f6a5b1950 100644
--- a/src/api/python/z3/z3.py
+++ b/src/api/python/z3/z3.py
@@ -2455,7 +2455,7 @@ def _is_numeral(ctx, a):
     return Z3_is_numeral_ast(ctx.ref(), a)
 
 def _is_algebraic(ctx, a):
-    return Z3_is_algebraic_number(ctx.ref(), a)
+    return 0 != Z3_is_algebraic_number(ctx.ref(), a)
 
 def is_int_value(a):
     """Return `True` if `a` is an integer value of sort Int.
diff --git a/src/tactic/core/reduce_invertible_tactic.cpp b/src/tactic/core/reduce_invertible_tactic.cpp
index 75b8cae0c..5fe6e9d76 100644
--- a/src/tactic/core/reduce_invertible_tactic.cpp
+++ b/src/tactic/core/reduce_invertible_tactic.cpp
@@ -178,11 +178,12 @@ private:
         if (m_bv.is_bv_mul(p)) {
             expr_ref rest(m);
             for (expr* arg : *to_app(p)) {
-                if (arg != v) 
+                if (arg != v) { 
                     if (rest) 
                         rest = m_bv.mk_bv_mul(rest, arg);
                     else
                         rest = arg;
+                }
             }
             if (!rest) return false;
 
@@ -251,11 +252,12 @@ private:
         if (m_arith.is_mul(p) && m_arith.is_real(p)) {
             expr_ref rest(m);
             for (expr* arg : *to_app(p)) {
-                if (arg != v) 
+                if (arg != v) {
                     if (rest) 
                         rest = m_arith.mk_mul(rest, arg);
                     else
                         rest = arg;
+                }
             }
             if (!rest) return false;
             expr_ref zero(m_arith.mk_real(0), m);