diff --git a/src/cmd_context/cmd_context.cpp b/src/cmd_context/cmd_context.cpp
index 0de13252b..a5c66f78b 100644
--- a/src/cmd_context/cmd_context.cpp
+++ b/src/cmd_context/cmd_context.cpp
@@ -627,7 +627,8 @@ void cmd_context::set_produce_proofs(bool f) {
     m_params.m_proof = f;
     if (has_manager()) {
         m().toggle_proof_mode(f ? PGM_ENABLED : PGM_DISABLED);
-        mk_solver();
+        if (m_solver_factory)
+            mk_solver();
     }
 }