diff --git a/mozglue/misc/TimeStamp_windows.cpp b/mozglue/misc/TimeStamp_windows.cpp
index d53ef443ae2..f6cd01c7118 100644
--- a/mozglue/misc/TimeStamp_windows.cpp
+++ b/mozglue/misc/TimeStamp_windows.cpp
@@ -37,7 +37,6 @@ private:
 static volatile ULONGLONG sResolution;
 static volatile ULONGLONG sResolutionSigDigs;
 static const double   kNsPerSecd  = 1000000000.0;
-static const LONGLONG kNsPerSec   = 1000000000;
 static const LONGLONG kNsPerMillisec = 1000000;
 
 // ----------------------------------------------------------------------------