diff --git a/src/main.c b/src/main.c
index 0aec356..339b1ba 100755
--- a/src/main.c
+++ b/src/main.c
@@ -21,8 +21,6 @@
 #include <limits.h>
 #include "syscap_tool.h"
 
-extern char *optarg;
-
 int main(int argc, char **argv)
 {
     int32_t ret, optIndex;
diff --git a/test/syscap_tool_test.c b/test/syscap_tool_test.c
index c92be59..1215ad6 100755
--- a/test/syscap_tool_test.c
+++ b/test/syscap_tool_test.c
@@ -24,8 +24,6 @@
 #include <wait.h>
 #include "syscap_tool.h"
 
-extern char *optarg;
-
 char *g_testFilePcid = "{\n  \"api_version\": 0,\n  \"manufacturer_id\": 0,\n  \"product\": \"rk3568\",\n" \
     "  \"syscap\": {\n    \"os\": [\n      \"SystemCapability.Account.AppAccount\",\n" \
     "      \"SystemCapability.Account.OsAccount\"\n    ]\n  },\n" \