diff --git a/desktop_version/src/UtilityClass.cpp b/desktop_version/src/UtilityClass.cpp
index e46bec3f..12d2304d 100644
--- a/desktop_version/src/UtilityClass.cpp
+++ b/desktop_version/src/UtilityClass.cpp
@@ -286,6 +286,11 @@ static bool VVV_isxdigit(const unsigned char digit)
 
 bool is_positive_num(const char* str, const bool hex)
 {
+	if (str[0] == '\0')
+	{
+		return false;
+	}
+
 	for (size_t i = 0; str[i] != '\0'; ++i)
 	{
 		if (hex)