diff --git a/caps/moz.build b/caps/moz.build
index 58b45e360..dc47ecbba 100644
--- a/caps/moz.build
+++ b/caps/moz.build
@@ -34,12 +34,7 @@ EXPORTS.mozilla = [
 ]
 
 SOURCES += [
-    # Compile this separately since nsExceptionHandler.h conflicts
-    # with something from nsNullPrincipal.cpp.
     'BasePrincipal.cpp',
-]
-
-UNIFIED_SOURCES += [
     'DomainPolicy.cpp',
     'nsJSPrincipals.cpp',
     'nsNullPrincipal.cpp',
diff --git a/caps/nsJSPrincipals.cpp b/caps/nsJSPrincipals.cpp
index 0f3afa14e..8349aed53 100644
--- a/caps/nsJSPrincipals.cpp
+++ b/caps/nsJSPrincipals.cpp
@@ -15,6 +15,7 @@
 #include "nsMemory.h"
 #include "nsStringBuffer.h"
 
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
 #include "mozilla/dom/StructuredCloneTags.h"
 // for mozilla::dom::workers::kJSPrincipalsDebugToken
 #include "mozilla/dom/workers/Workers.h"
@@ -22,6 +23,7 @@
 
 using namespace mozilla;
 using namespace mozilla::ipc;
+using namespace mozilla::dom;
 
 NS_IMETHODIMP_(MozExternalRefCountType)
 nsJSPrincipals::AddRef()
diff --git a/caps/nsNullPrincipal.cpp b/caps/nsNullPrincipal.cpp
index 6ebf0f129..386344e37 100644
--- a/caps/nsNullPrincipal.cpp
+++ b/caps/nsNullPrincipal.cpp
@@ -20,6 +20,8 @@
 #include "nsIClassInfoImpl.h"
 #include "nsNetCID.h"
 #include "nsError.h"
+#include "nsIObjectInputStream.h"
+#include "nsIObjectOutputStream.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsPrincipal.h"
 #include "nsScriptSecurityManager.h"
diff --git a/caps/nsNullPrincipalURI.cpp b/caps/nsNullPrincipalURI.cpp
index f8b867160..159928ba6 100644
--- a/caps/nsNullPrincipalURI.cpp
+++ b/caps/nsNullPrincipalURI.cpp
@@ -6,8 +6,12 @@
 
 #include "nsNullPrincipalURI.h"
 
+#include "mozilla/ArrayUtils.h"
+
 #include "mozilla/DebugOnly.h"
 #include "mozilla/MemoryReporting.h"
+#include "mozilla/Services.h"
+#include "mozilla/Unused.h"
 
 #include "mozilla/ipc/URIParams.h"
 
@@ -15,6 +19,8 @@
 #include "nsCRT.h"
 #include "nsIUUIDGenerator.h"
 
+using namespace mozilla;
+
 ////////////////////////////////////////////////////////////////////////////////
 //// nsNullPrincipalURI
 
diff --git a/caps/nsPrincipal.cpp b/caps/nsPrincipal.cpp
index 129cdf9a0..d111042c1 100644
--- a/caps/nsPrincipal.cpp
+++ b/caps/nsPrincipal.cpp
@@ -19,6 +19,8 @@
 #include "nsJSPrincipals.h"
 #include "nsIEffectiveTLDService.h"
 #include "nsIClassInfoImpl.h"
+#include "nsIObjectInputStream.h"
+#include "nsIObjectOutputStream.h"
 #include "nsIProtocolHandler.h"
 #include "nsError.h"
 #include "nsIContentSecurityPolicy.h"
diff --git a/caps/nsScriptSecurityManager.cpp b/caps/nsScriptSecurityManager.cpp
index 129a4d0da..bf5f33599 100644
--- a/caps/nsScriptSecurityManager.cpp
+++ b/caps/nsScriptSecurityManager.cpp
@@ -59,6 +59,7 @@
 #include "mozIApplication.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/ContentParent.h"
 #include <stdint.h>
 #include "mozilla/dom/ScriptSettings.h"
 #include "mozilla/ClearOnShutdown.h"
@@ -70,6 +71,7 @@
 
 using namespace mozilla;
 using namespace mozilla::dom;
+using namespace mozilla::ipc;
 
 nsIIOService    *nsScriptSecurityManager::sIOService = nullptr;
 nsIStringBundle *nsScriptSecurityManager::sStrBundle = nullptr;
diff --git a/chrome/moz.build b/chrome/moz.build
index b75e9435d..15439356a 100644
--- a/chrome/moz.build
+++ b/chrome/moz.build
@@ -17,7 +17,7 @@ EXPORTS.mozilla.chrome += [
     'RegistryMessageUtils.h',
 ]
 
-UNIFIED_SOURCES += [
+SOURCES += [
     'nsChromeProtocolHandler.cpp',
     'nsChromeRegistry.cpp',
     'nsChromeRegistryChrome.cpp',
diff --git a/chrome/nsChromeRegistry.cpp b/chrome/nsChromeRegistry.cpp
index 485ca002c..4bd8b4dca 100644
--- a/chrome/nsChromeRegistry.cpp
+++ b/chrome/nsChromeRegistry.cpp
@@ -14,6 +14,7 @@
 #include "nsError.h"
 #include "nsEscape.h"
 #include "nsNetUtil.h"
+#include "nsIURL.h"
 #include "nsString.h"
 #include "nsQueryObject.h"