1 files changed, 6 insertions, 0 deletions
diff --git a/core/ustring.cpp b/core/ustring.cpp
index 5d3cf5f1a4..572ad1af59 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -1025,6 +1025,9 @@ String String::chr(CharType p_char) {
 }
 
 String String::num(double p_num, int p_decimals) {
+	if (Math::is_nan(p_num)) {
+		return "nan";
+	}
 #ifndef NO_USE_STDLIB
 
 	if (p_decimals > 16) {
@@ -1313,6 +1316,9 @@ String String::num_real(double p_num) {
 }
 
 String String::num_scientific(double p_num) {
+	if (Math::is_nan(p_num)) {
+		return "nan";
+	}
 #ifndef NO_USE_STDLIB
 
 	char buf[256];