diff --git a/include/syscap_tool.h b/include/syscap_tool.h
index d485c9b..a606e32 100644
--- a/include/syscap_tool.h
+++ b/include/syscap_tool.h
@@ -13,8 +13,8 @@
  * limitations under the License.
  */
 
-#ifndef _SYSCAP_TOOL_H
-#define _SYSCAP_TOOL_H
+#ifndef SYSCAP_TOOL_H
+#define SYSCAP_TOOL_H
 
 #include <stdint.h>
 
@@ -48,4 +48,4 @@ int32_t SeparateSyscapFromString(const char *inputString, uint32_t *osArray, uin
 #endif /* __cplusplus */
 #endif /* __cplusplus */
 
-#endif /* _SYSCAP_TOOL_H */
\ No newline at end of file
+#endif /* SYSCAP_TOOL_H */
\ No newline at end of file
diff --git a/src/syscap_tool.c b/src/syscap_tool.c
index 4697046..38f2e9a 100644
--- a/src/syscap_tool.c
+++ b/src/syscap_tool.c
@@ -330,7 +330,7 @@ FREE_SYSCAP_OUT:
     return ret;
 }
 
-static int32_t CheckRpcidFormat(char *inputFile, char **buffer, uint32_t *Len)
+static int32_t CheckRpcidFormat(char *inputFile, char **buffer, uint32_t *len)
 {
     uint32_t bufferLen;
     uint16_t sysCaptype, sysCapLength;
@@ -362,7 +362,7 @@ static int32_t CheckRpcidFormat(char *inputFile, char **buffer, uint32_t *Len)
     }
 
     *buffer = contextBuffer;
-    *Len = bufferLen;
+    *len = bufferLen;
     return 0;
 }