diff --git a/src/ast/rewriter/bit_blaster/bit_blaster_rewriter.cpp b/src/ast/rewriter/bit_blaster/bit_blaster_rewriter.cpp
index 68e3825c9f1..bb8b067e808 100644
--- a/src/ast/rewriter/bit_blaster/bit_blaster_rewriter.cpp
+++ b/src/ast/rewriter/bit_blaster/bit_blaster_rewriter.cpp
@@ -615,6 +615,8 @@ MK_PARAMETRIC_UNARY_REDUCE(reduce_sign_extend, mk_sign_extend);
         if (m_blast_quant) {   
             if (m_bindings.empty())
                 return false;
+            if (!butil().is_bv(t))
+                return false;
             unsigned shift = m_shifts.back();
             if (t->get_idx() >= m_bindings.size()) {
                 if (shift == 0)