diff --git a/Libraries/LibWeb/PixelUnits.h b/Libraries/LibWeb/PixelUnits.h
index af1f4f937d..217e84664d 100644
--- a/Libraries/LibWeb/PixelUnits.h
+++ b/Libraries/LibWeb/PixelUnits.h
@@ -246,7 +246,7 @@ public:
         return *this;
     }
 
-    constexpr CSSPixels abs() const { return from_raw(::abs(m_value)); }
+    constexpr CSSPixels abs() const { return raw_value() < 0 ? from_raw(saturating_sub(0, raw_value())) : *this; }
 
     CSSPixels& scale_by(float value)
     {
diff --git a/Tests/LibWeb/TestCSSPixels.cpp b/Tests/LibWeb/TestCSSPixels.cpp
index c4b5a99309..56388b8b25 100644
--- a/Tests/LibWeb/TestCSSPixels.cpp
+++ b/Tests/LibWeb/TestCSSPixels.cpp
@@ -124,6 +124,14 @@ TEST_CASE(saturated_subtraction)
     EXPECT_EQ(value - -1, CSSPixels(INFINITY));
 }
 
+TEST_CASE(saturated_abs)
+{
+    // abs() of the minimum saturates to the maximum instead of overflowing.
+    EXPECT_EQ(CSSPixels::min().abs(), CSSPixels::max());
+    EXPECT_EQ(CSSPixels::from_raw(-5).abs(), CSSPixels::from_raw(5));
+    EXPECT_EQ(CSSPixels::from_raw(5).abs(), CSSPixels::from_raw(5));
+}
+
 TEST_CASE(multiplication_uses_i64_for_raw_values)
 {
     CSSPixels a(1200);