diff --git a/dom/mobileconnection/moz.build b/dom/mobileconnection/moz.build
index f7df4607b5ff..98307a6c67e9 100644
--- a/dom/mobileconnection/moz.build
+++ b/dom/mobileconnection/moz.build
@@ -40,13 +40,19 @@ UNIFIED_SOURCES += [
     'ipc/MobileConnectionParent.cpp',
     'MobileCallForwardingOptions.cpp',
     'MobileCellInfo.cpp',
-    'MobileConnection.cpp',
     'MobileConnectionArray.cpp',
     'MobileConnectionCallback.cpp',
     'MobileConnectionInfo.cpp',
     'MobileNetworkInfo.cpp',
 ]
 
+SOURCES += [
+    'MobileConnection.cpp', # Non-unified due to no_pgo
+]
+
+if CONFIG['_MSC_VER'] and CONFIG['CPU_ARCH'] == 'x86_64':
+    SOURCES['MobileConnection.cpp'].no_pgo = True # VS2013 crashes, bug 1084162
+
 IPDL_SOURCES += [
     'ipc/PMobileConnection.ipdl',
     'ipc/PMobileConnectionRequest.ipdl',