diff --git a/src/backend/jit/llvm/llvmjit_expr.c b/src/backend/jit/llvm/llvmjit_expr.c
index d04ff62..7e7387e 100644
--- a/src/backend/jit/llvm/llvmjit_expr.c
+++ b/src/backend/jit/llvm/llvmjit_expr.c
@@ -2491,6 +2491,7 @@ llvm_compile_expr(ExprState *state)
 						/* store trans value */
 						LLVMBuildStore(b, v_newval, v_transvaluep);
 						LLVMBuildStore(b, v_fcinfo_isnull, v_transnullp);
+						l_mcxt_switch(mod, b, v_oldcontext);
 						LLVMBuildBr(b, opblocks[i + 1]);
 
 						/* returned datum passed datum, no need to reparent */