diff --git a/core/iwasm/compilation/aot_llvm.h b/core/iwasm/compilation/aot_llvm.h
index f412d482..289384a1 100644
--- a/core/iwasm/compilation/aot_llvm.h
+++ b/core/iwasm/compilation/aot_llvm.h
@@ -611,12 +611,6 @@ aot_load_const_from_table(AOTCompContext *comp_ctx, LLVMValueRef base,
 bool
 aot_check_simd_compatibility(const char *arch_c_str, const char *cpu_c_str);
 
-void
-aot_add_expand_memory_op_pass(LLVMPassManagerRef pass);
-
-void
-aot_add_simple_loop_unswitch_pass(LLVMPassManagerRef pass);
-
 void
 aot_apply_llvm_new_pass_manager(AOTCompContext *comp_ctx, LLVMModuleRef module);
 
diff --git a/core/iwasm/compilation/aot_llvm_extra.cpp b/core/iwasm/compilation/aot_llvm_extra.cpp
index ed9447af..dd1a1e84 100644
--- a/core/iwasm/compilation/aot_llvm_extra.cpp
+++ b/core/iwasm/compilation/aot_llvm_extra.cpp
@@ -76,12 +76,6 @@ LLVM_C_EXTERN_C_BEGIN
 bool
 aot_check_simd_compatibility(const char *arch_c_str, const char *cpu_c_str);
 
-void
-aot_add_expand_memory_op_pass(LLVMPassManagerRef pass);
-
-void
-aot_add_simple_loop_unswitch_pass(LLVMPassManagerRef pass);
-
 void
 aot_apply_llvm_new_pass_manager(AOTCompContext *comp_ctx, LLVMModuleRef module);