diff --git a/cmake/preInstall.sh b/cmake/preInstall.sh
index 3ec1f37..765e889 100644
--- a/cmake/preInstall.sh
+++ b/cmake/preInstall.sh
@@ -1,9 +1,12 @@
 #!/bin/sh
 DST=${RPM_INSTALL_PREFIX}
+
 mkdir -p ${DST}/plug/protocol/
 touch ${DST}/plug/conflist.inf
+
 mkdir ${DST}/etc/
 touch ${DST}/etc/entrylist.conf
+
 if [[ -z `grep -rn 'quic.inf' ${DST}/plug/conflist.inf` ]];then
 	sed -i '/\[protocol\]/a\./plug/protocol/quic/quic.inf' ${DST}/plug/conflist.inf
 fi
diff --git a/cmake/preUninstall.sh b/cmake/preUninstall.sh
index 99cb778..377a0f5 100644
--- a/cmake/preUninstall.sh
+++ b/cmake/preUninstall.sh
@@ -3,7 +3,15 @@ if [ $1 == 0 ]; then
 	DST=${RPM_INSTALL_PREFIX}
 	mkdir -p ${DST}/plug/business/
 	touch ${DST}/plug/conflist.inf
+	
+	mkdir -p ${DST}/etc/
+	touch ${DST}/etc/entrylist.conf
 
-	sed -i '/quic.inf/d' ${DST}/plug/conflist.inf
-	sed -i '/QUIC/d' ${DST}etc/entrylist.conf
+	if [[ -f ${DST}/plug/conflist.inf ]];then
+		sed -i '/quic.inf/d' ${DST}/plug/conflist.inf
+	fi
+
+	if [[ -f ${DST}/etc/entrylist.conf ]];then
+		sed -i '/QUIC/d' ${DST}/etc/entrylist.conf
+	fi
 fi
diff --git a/src/gquic_process.c b/src/gquic_process.c
index e56fcc8..f7176b5 100644
--- a/src/gquic_process.c
+++ b/src/gquic_process.c
@@ -255,6 +255,7 @@ static enum _QUIC_VERSION parse_q0to43_header(struct streaminfo *pstream, struct
 
 	if(pstream->curdir==DIR_S2C && gquic_hdr->public_flags&GQUIC_PUBLIC_FLAG_VERSION)
 	{
+		#if 0
 		gquic_hdr->is_version_negotiation=TRUE; // Version Negotiation Packet
 
 		gquic_hdr->negotiation_version_num=(payload_len-*used_len)/sizeof(int);
@@ -265,6 +266,7 @@ static enum _QUIC_VERSION parse_q0to43_header(struct streaminfo *pstream, struct
 			gquic_hdr->negotiation_version_list[i]=*(unsigned int *)(payload+*used_len);
 			*used_len+=sizeof(unsigned int);
 		}
+		#endif
 		return QUIC_VERSION_UNKNOWN;
 	}