1 files changed, 7 insertions, 7 deletions

diff --git a/src/FbTk/StringUtil.cc b/src/FbTk/StringUtil.cc
index 9cd2c9a..d6f2c8f 100644
--- a/src/FbTk/StringUtil.cc
+++ b/src/FbTk/StringUtil.cc
@@ -70,7 +70,7 @@ using std::transform;
 namespace {
 
 const size_t DIGITS10_ULONGLONGINT = 20; // ULLONG_MAX = 18446744073709551615
-const size_t DIGITS16_ULONGLONGINT = 18; // ULLONG_MAX = 0xffffffffffffffff
+const size_t DIGITS16_ULONGLONGINT = 16; // ULLONG_MAX = ffffffffffffffff
 
 template <typename T>
 int extractBigNumber(const char* in, T (*extractFunc)(const char*, char**, int), T& out) {
@@ -173,15 +173,15 @@ int extractNumber(const std::string& in, unsigned long long& out) {
 
 
 std::string number2String(long long num) {
-    char s[DIGITS10_ULONGLONGINT];
-    snprintf(s, sizeof(s), "%lld", num);
-    return std::string(s);
+    char s[DIGITS10_ULONGLONGINT+1];
+    int n = snprintf(s, sizeof(s), "%lld", num);
+    return std::string(s, n);
 }
 
 std::string number2HexString(long long num) {
-    char s[DIGITS16_ULONGLONGINT];
-    snprintf(s, sizeof(s), "%llx", num);
-    return std::string(s);
+    char s[DIGITS16_ULONGLONGINT+1];
+    int n = snprintf(s, sizeof(s), "%llx", num);
+    return std::string(s, n);
 }