diff --git a/public-trunk/CommonLibs/Timeval.cpp b/public-trunk/CommonLibs/Timeval.cpp
index d61de0c..ae57345 100644
--- a/public-trunk/CommonLibs/Timeval.cpp
+++ b/public-trunk/CommonLibs/Timeval.cpp
@@ -70,8 +70,8 @@ double Timeval::seconds() const
 long Timeval::delta(const Timeval& other) const
 {
 	// 2^31 milliseconds is just over 4 years.
-	long deltaS = other.sec() - sec();
-	long deltaUs = other.usec() - usec();
+	int32_t deltaS = other.sec() - sec();
+	int32_t deltaUs = other.usec() - usec();
 	return 1000*deltaS + deltaUs/1000;
 }