diff --git a/pigpio.h b/pigpio.h
index d1cf3af..0fe80f6 100644
--- a/pigpio.h
+++ b/pigpio.h
@@ -31,7 +31,7 @@ For more information, please refer to <http://unlicense.org/>
 #include <stdint.h>
 #include <pthread.h>
 
-#define PIGPIO_VERSION 6509
+#define PIGPIO_VERSION 6511
 
 /*TEXT
 
diff --git a/x_pigpio.c b/x_pigpio.c
index f983687..c252e0e 100644
--- a/x_pigpio.c
+++ b/x_pigpio.c
@@ -856,7 +856,7 @@ int main(int argc, char *argv[])
 {
    int i, t, c, status;
 
-   char test[64];
+   char test[64]={0,};
 
    if (argc > 1)
    {
diff --git a/x_pigpiod_if.c b/x_pigpiod_if.c
index 94f2045..ae4d7a5 100644
--- a/x_pigpiod_if.c
+++ b/x_pigpiod_if.c
@@ -825,7 +825,7 @@ int main(int argc, char *argv[])
 {
    int i, t, c, status;
 
-   char test[64];
+   char test[64]={0,};
 
    if (argc > 1)
    {
diff --git a/x_pigpiod_if2.c b/x_pigpiod_if2.c
index b5a6546..0494401 100644
--- a/x_pigpiod_if2.c
+++ b/x_pigpiod_if2.c
@@ -837,7 +837,7 @@ int main(int argc, char *argv[])
 {
    int i, t, c, pi;
 
-   char test[64];
+   char test[64]={0,};
 
    if (argc > 1)
    {