diff --git a/mozilla/js/src/fdlibm/e_pow.c b/mozilla/js/src/fdlibm/e_pow.c
index 3c15d38199f..cbb34f0df8f 100644
--- a/mozilla/js/src/fdlibm/e_pow.c
+++ b/mozilla/js/src/fdlibm/e_pow.c
@@ -91,6 +91,11 @@
 
 #include "fdlibm.h"
 
+#if defined(_MSC_VER)
+/* Microsoft Compiler */
+#pragma warning( disable : 4723 ) /* disables potential divide by 0 warning */
+#endif
+
 #ifdef __STDC__
 static const double 
 #else
diff --git a/mozilla/js/src/fdlibm/e_sqrt.c b/mozilla/js/src/fdlibm/e_sqrt.c
index 354e4dfdf97..3eb05a77256 100644
--- a/mozilla/js/src/fdlibm/e_sqrt.c
+++ b/mozilla/js/src/fdlibm/e_sqrt.c
@@ -115,6 +115,11 @@
 
 #include "fdlibm.h"
 
+#if defined(_MSC_VER)
+/* Microsoft Compiler */
+#pragma warning( disable : 4723 ) /* disables potential divide by 0 warning */
+#endif
+
 #ifdef __STDC__
 static	const double	one	= 1.0, tiny=1.0e-300;
 #else