diff --git a/src/chat/chat-room.cpp b/src/chat/chat-room.cpp
index 6d8373a6a..b6dcb41d2 100644
--- a/src/chat/chat-room.cpp
+++ b/src/chat/chat-room.cpp
@@ -247,7 +247,7 @@ string ChatRoomPrivate::createIsComposingXml () const {
 	}
 	if ((err >= 0) && isComposing) {
 		int refreshTimeout = lp_config_get_int(core->config, "sip", "composing_refresh_timeout", composingDefaultRefreshTimeout);
-		err = xmlTextWriterWriteElement(writer, (const xmlChar *)"refresh", (const xmlChar *)to_string(refreshTimeout).c_str());
+		err = xmlTextWriterWriteElement(writer, (const xmlChar *)"refresh", (const xmlChar *)Utils::toString(refreshTimeout).c_str());
 	}
 	if (err >= 0) {
 		/* Close the "isComposing" element. */
diff --git a/src/utils/utils.cpp b/src/utils/utils.cpp
index aa21be3dd..1c205d3ed 100644
--- a/src/utils/utils.cpp
+++ b/src/utils/utils.cpp
@@ -17,6 +17,7 @@
  */
 
 #include <cstdlib>
+#include <sstream>
 
 #include <bctoolbox/port.h>
 
@@ -52,6 +53,30 @@ vector<string> Utils::split (const string &str, const string &delimiter) {
 	return out;
 }
 
+#ifndef __ANDROID__
+#define TO_STRING_IMPL(TYPE) \
+	string Utils::toString(TYPE val) { \
+		return to_string(val); \
+	}
+#else
+#define TO_STRING_IMPL(TYPE) \
+	string Utils::toString(TYPE val) { \
+		ostringstream os; \
+		os << val; \
+		return os.str(); \
+	}
+#endif // ifndef __ANDROID__
+
+TO_STRING_IMPL(int)
+TO_STRING_IMPL(long)
+TO_STRING_IMPL(long long)
+TO_STRING_IMPL(unsigned)
+TO_STRING_IMPL(unsigned long)
+TO_STRING_IMPL(unsigned long long)
+TO_STRING_IMPL(float)
+TO_STRING_IMPL(double)
+TO_STRING_IMPL(long double)
+
 int Utils::stoi (const string &str, size_t *idx, int base) {
 	char *p;
 	int v = strtol(str.c_str(), &p, base);
diff --git a/src/utils/utils.h b/src/utils/utils.h
index 6779552a8..d75838826 100644
--- a/src/utils/utils.h
+++ b/src/utils/utils.h
@@ -37,6 +37,16 @@ namespace Utils {
 		return split(str, std::string(1, delimiter));
 	}
 
+	LINPHONE_PUBLIC std::string toString (int val);
+	LINPHONE_PUBLIC std::string toString (long val);
+	LINPHONE_PUBLIC std::string toString (long long val);
+	LINPHONE_PUBLIC std::string toString (unsigned val);
+	LINPHONE_PUBLIC std::string toString (unsigned long val);
+	LINPHONE_PUBLIC std::string toString (unsigned long long val);
+	LINPHONE_PUBLIC std::string toString (float val);
+	LINPHONE_PUBLIC std::string toString (double val);
+	LINPHONE_PUBLIC std::string toString (long double val);
+
 	LINPHONE_PUBLIC int stoi (const std::string &str, size_t *idx = 0, int base = 10);
 
 	// Return a buffer allocated with new.