diff --git a/source/libs/tcs/inc/tcsInt.h b/source/libs/tcs/inc/tcsInt.h
index a7e304b544..b24a47aa98 100644
--- a/source/libs/tcs/inc/tcsInt.h
+++ b/source/libs/tcs/inc/tcsInt.h
@@ -26,6 +26,8 @@
 extern "C" {
 #endif
 
+extern int8_t tsS3Ablob;
+
 typedef enum {
   TOS_PROTO_NIL,
   TOS_PROTO_S3,
diff --git a/source/libs/tcs/src/tcs.c b/source/libs/tcs/src/tcs.c
index 1716228d5c..73cb64c34d 100644
--- a/source/libs/tcs/src/tcs.c
+++ b/source/libs/tcs/src/tcs.c
@@ -24,8 +24,6 @@
 
 STcs tcs;
 
-extern int8_t tsS3Ablob;
-
 int32_t tcsInit() {
   int32_t code = 0;