diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1dca362c..c7e7cd3f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,7 +70,7 @@ option(ENABLE_ASM_UNDERSCORE_PREFIX "Add prefix `_` to assembly symbols" ON)
 
 option(ENABLE_TLS_DEBUG "Enable TLS and TLCP print debug message" OFF)
 
-
+option (ENABLE_SM2_ENC_PRE_COMPUTE "Enable SM2 encryption precomputing" ON)
 
 set(src
 	src/version.c
diff --git a/src/sdf/sdf_sm2_enc.c b/src/sdf/sdf_sm2_enc.c
index 1acc9985..a230cc01 100644
--- a/src/sdf/sdf_sm2_enc.c
+++ b/src/sdf/sdf_sm2_enc.c
@@ -710,7 +710,6 @@ int sm2_encrypt_init(SM2_ENC_CTX *ctx)
 		return -1;
 	}
 
-#define ENABLE_SM2_ENC_PRE_COMPUTE 1
 #if ENABLE_SM2_ENC_PRE_COMPUTE
 	if (sm2_encrypt_pre_compute(ctx->pre_comp) != 1) {
 		error_print();
diff --git a/src/sm2_enc.c b/src/sm2_enc.c
index af7424df..98b2a309 100644
--- a/src/sm2_enc.c
+++ b/src/sm2_enc.c
@@ -530,7 +530,6 @@ int sm2_encrypt_init(SM2_ENC_CTX *ctx)
 		return -1;
 	}
 
-#define ENABLE_SM2_ENC_PRE_COMPUTE 1
 #if ENABLE_SM2_ENC_PRE_COMPUTE
 	if (sm2_encrypt_pre_compute(ctx->pre_comp) != 1) {
 		error_print();