diff --git a/stepmania/src/RageUtil.cpp b/stepmania/src/RageUtil.cpp
index c789316f63..2ee68b6e4b 100644
--- a/stepmania/src/RageUtil.cpp
+++ b/stepmania/src/RageUtil.cpp
@@ -461,7 +461,7 @@ void TrimRight(CString &str, const char *s)
 
 void StripCrnl(CString &s)
 {
-	while(s[s.size()-1] == '\r' || s[s.size()-1] == '\n')
+	while(s.size() && s[s.size()-1] == '\r' || s[s.size()-1] == '\n')
 		s.erase(s.size()-1);
 }