diff --git a/core/string/ustring.cpp b/core/string/ustring.cpp
index 6afe28a6a721..88b3f157caf0 100644
--- a/core/string/ustring.cpp
+++ b/core/string/ustring.cpp
@@ -1696,7 +1696,7 @@ String String::num_scientific(double p_num) {
 	// MinGW requires _set_output_format() to conform to C99 output for printf
 	unsigned int old_exponent_format = _set_output_format(_TWO_DIGIT_EXPONENT);
 #endif
-	snprintf(buf, 256, "%lg", p_num);
+	snprintf(buf, 256, "%.16lg", p_num);
 
 #if defined(__MINGW32__) && defined(_TWO_DIGIT_EXPONENT) && !defined(_UCRT)
 	_set_output_format(old_exponent_format);