diff --git a/p_ctstat.c b/p_ctstat.c
index 27e9104..3f5e3ea 100644
--- a/p_ctstat.c
+++ b/p_ctstat.c
@@ -63,7 +63,6 @@ static int probe(void)
 	fp = fopen("/proc/net/stat/ip_conntrack", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin ctstat");
-		free(buffer);
 		return -1;
 	}
 
diff --git a/p_memory.c b/p_memory.c
index 3da6c16..767eee5 100644
--- a/p_memory.c
+++ b/p_memory.c
@@ -77,7 +77,6 @@ static int probe(void)
 	fp = fopen("/proc/meminfo", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin memory");
-		free(buffer);
 		return -1;
 	}
 
diff --git a/p_netdev.c b/p_netdev.c
index e85b102..48e5f61 100644
--- a/p_netdev.c
+++ b/p_netdev.c
@@ -51,7 +51,6 @@ static int probe(void)
 	fp = fopen("/proc/net/dev", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin netdev");
-		free(buffer);
 		return -1;
 	}
 
diff --git a/p_rtstat.c b/p_rtstat.c
index c642df8..565093f 100644
--- a/p_rtstat.c
+++ b/p_rtstat.c
@@ -79,7 +79,6 @@ static int probe(void)
 	fp = fopen("/proc/net/stat/rt_cache", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin rtstat");
-		free(buffer);
 		return -1;
 	}
 
diff --git a/p_stat.c b/p_stat.c
index b6e66b4..1ba22c1 100644
--- a/p_stat.c
+++ b/p_stat.c
@@ -79,7 +79,6 @@ static int probe(void)
 	fp = fopen("/proc/stat", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin stat");
-		free(buffer);
 		return -1;
 	}
 
diff --git a/p_vmstat.c b/p_vmstat.c
index a635f2e..f9fc46e 100644
--- a/p_vmstat.c
+++ b/p_vmstat.c
@@ -60,7 +60,6 @@ static int probe(void)
 	fp = fopen("/proc/vmstat", "r");
 	if (fp == NULL) {
 		log_print(LOG_WARN, "plugin vmstat");
-		free(buffer);
 		return -1;
 	}