diff --git a/uppsrc/Core/Stream.cpp b/uppsrc/Core/Stream.cpp
index a56475791..c39c7b607 100644
--- a/uppsrc/Core/Stream.cpp
+++ b/uppsrc/Core/Stream.cpp
@@ -1531,12 +1531,13 @@ String ReadStdIn()
 String LoadStream(Stream& in) {
 	if(in.IsOpen()) {
 		in.ClearError();
-		int size = (int)in.GetLeft();
-		StringBuffer s(size);
-		if((dword)size != 0xffffffff)
+		int64 size = in.GetLeft();
+		if(size >= 0 && size < INT_MAX / 2) {
+			StringBuffer s((int)size);
 			in.Get(s, size);
-		if(!in.IsError())
-			return s;
+			if(!in.IsError())
+				return s;
+		}
 	}
 	return String::GetVoid();
 }