diff --git a/include/linphone/utils/utils.h b/include/linphone/utils/utils.h
index 8a160d63b..cf384f01c 100644
--- a/include/linphone/utils/utils.h
+++ b/include/linphone/utils/utils.h
@@ -71,12 +71,14 @@ namespace Utils {
 
 	LINPHONE_PUBLIC int stoi (const std::string &str, size_t *idx = 0, int base = 10);
 	LINPHONE_PUBLIC long long stoll (const std::string &str, size_t *idx = 0, int base = 10);
+	LINPHONE_PUBLIC unsigned long long stoull (const std::string &str, size_t *idx = 0, int base = 10);
 	LINPHONE_PUBLIC double stod (const std::string &str, size_t *idx = 0);
 	LINPHONE_PUBLIC float stof (const std::string &str, size_t *idx = 0);
 	LINPHONE_PUBLIC bool stob (const std::string &str);
 
 	LINPHONE_PUBLIC int stoi (const char *str, size_t *idx = 0, int base = 10);
 	LINPHONE_PUBLIC long long stoll (const char *str, size_t *idx = 0, int base = 10);
+	LINPHONE_PUBLIC unsigned long long stoull (const char *str, size_t *idx = 0, int base = 10);
 	LINPHONE_PUBLIC double stod (const char *str, size_t *idx = 0);
 	LINPHONE_PUBLIC float stof (const char *str, size_t *idx = 0);
 
diff --git a/src/utils/utils.cpp b/src/utils/utils.cpp
index e91583b34..66261305b 100644
--- a/src/utils/utils.cpp
+++ b/src/utils/utils.cpp
@@ -92,6 +92,10 @@ long long Utils::stoll (const string &str, size_t *idx, int base) {
 	return stoll(str.c_str(), idx, base);
 }
 
+unsigned long long Utils::stoull (const string &str, size_t *idx, int base) {
+	return stoull(str.c_str(), idx, base);
+}
+
 double Utils::stod (const string &str, size_t *idx) {
 	return stod(str.c_str(), idx);
 }
@@ -125,6 +129,16 @@ long long Utils::stoll (const char *str, size_t *idx, int base) {
 	return v;
 }
 
+unsigned long long Utils::stoull (const char *str, size_t *idx, int base) {
+	char *p;
+	unsigned long long v = static_cast<int>(strtoull(str, &p, base));
+
+	if (idx)
+		*idx = static_cast<size_t>(p - str);
+
+	return v;
+}
+
 double Utils::stod (const char *str, size_t *idx) {
 	char *p;
 	double v = strtod(str, &p);
diff --git a/src/variant/variant.cpp b/src/variant/variant.cpp
index defd7b847..7590002dd 100644
--- a/src/variant/variant.cpp
+++ b/src/variant/variant.cpp
@@ -351,7 +351,38 @@ static inline long long getValueAsNumber (const VariantPrivate &p, bool *soFarSo
 }
 
 static inline unsigned long long getValueAsUnsignedNumber (const VariantPrivate &p, bool *soFarSoGood) {
-	// TODO.
+	const int type = p.getType();
+	L_ASSERT(type > Variant::Invalid && type < Variant::MaxDefaultTypes);
+
+	switch (static_cast<Variant::Type>(type)) {
+		case Variant::Int:
+		case Variant::Short:
+		case Variant::Long:
+		case Variant::LongLong:
+		case Variant::Char:
+		case Variant::Double:
+		case Variant::Float:
+			return static_cast<unsigned long long>(getAssumedNumber(p));
+
+		case Variant::UnsignedInt:
+		case Variant::UnsignedShort:
+		case Variant::UnsignedLong:
+		case Variant::UnsignedLongLong:
+			return getAssumedUnsignedNumber(p);
+
+		case Variant::Bool:
+			return static_cast<unsigned long long>(p.value.b);
+
+		case Variant::String:
+			return Utils::stoull(*p.value.str);
+
+		case Variant::Generic:
+			return static_cast<unsigned long long>(!!p.value.g);
+
+		default:
+			*soFarSoGood = false;
+	}
+
 	return 0;
 }