diff --git a/interfaces/inner_api/syscap_interface.c b/interfaces/inner_api/syscap_interface.c
index 34cb6f0..c70d560 100644
--- a/interfaces/inner_api/syscap_interface.c
+++ b/interfaces/inner_api/syscap_interface.c
@@ -249,6 +249,7 @@ bool DecodePrivateSyscap(char *input, char (**output)[SINGLE_SYSCAP_LEN], int *o
             *bufferPos = '\0';
             if (sprintf_s(*outputArray, SINGLE_SYSCAP_LEN, "SystemCapability.%s", buffer) == -1) {
                 free(outputArray);
+                outputArray = NULL;
                 return false;
             }
             bufferPos = buffer;