diff --git a/Userland/Libraries/LibWeb/CMakeLists.txt b/Userland/Libraries/LibWeb/CMakeLists.txt
index 946413fdad..831336e4db 100644
--- a/Userland/Libraries/LibWeb/CMakeLists.txt
+++ b/Userland/Libraries/LibWeb/CMakeLists.txt
@@ -15,7 +15,6 @@ set(SOURCES
     Bindings/Wrappable.cpp
     Crypto/Crypto.cpp
     Crypto/SubtleCrypto.cpp
-    CSS/Serialize.cpp
     CSS/CSSConditionRule.cpp
     CSS/CSSGroupingRule.cpp
     CSS/CSSImportRule.cpp
@@ -26,7 +25,6 @@ set(SOURCES
     CSS/CSSStyleRule.cpp
     CSS/CSSStyleSheet.cpp
     CSS/CSSSupportsRule.cpp
-    CSS/ResolvedCSSStyleDeclaration.cpp
     CSS/DefaultStyleSheetSource.cpp
     CSS/Display.cpp
     CSS/Length.cpp
@@ -42,9 +40,11 @@ set(SOURCES
     CSS/PropertyID.cpp
     CSS/PropertyID.h
     CSS/QuirksModeStyleSheetSource.cpp
+    CSS/ResolvedCSSStyleDeclaration.cpp
     CSS/Screen.cpp
     CSS/Selector.cpp
     CSS/SelectorEngine.cpp
+    CSS/Serialize.cpp
     CSS/StyleComputer.cpp
     CSS/StyleProperties.cpp
     CSS/StyleSheet.cpp