diff --git a/layout/generic/ScrollAnchorContainer.cpp b/layout/generic/ScrollAnchorContainer.cpp
index 022185e17991..6a36ac5dd010 100644
--- a/layout/generic/ScrollAnchorContainer.cpp
+++ b/layout/generic/ScrollAnchorContainer.cpp
@@ -21,7 +21,15 @@
 using namespace mozilla::dom;
 
 #define ANCHOR_LOG(...)
-// #define ANCHOR_LOG(...) printf_stderr("ANCHOR: " __VA_ARGS__)
+// #define ANCHOR_LOG(fmt, ...)                  \
+//   printf_stderr("ANCHOR(%p, %s): " fmt, this, \
+//                 Frame()                       \
+//                     ->PresContext()           \
+//                     ->Document()              \
+//                     ->GetDocumentURI()        \
+//                     ->GetSpecOrDefault()      \
+//                     .get(),                   \
+//                 ##__VA_ARGS__)
 
 namespace mozilla {
 namespace layout {
@@ -194,7 +202,7 @@ void ScrollAnchorContainer::SelectAnchor() {
 
   AUTO_PROFILER_LABEL("ScrollAnchorContainer::SelectAnchor", LAYOUT);
   ANCHOR_LOG(
-      "Selecting anchor for %p with scroll-port=%s.\n", this,
+      "Selecting anchor for with scroll-port=%s.\n",
       mozilla::ToString(mScrollFrame->GetVisualOptimalViewingRect()).c_str());
 
   const nsStyleDisplay* disp = Frame()->StyleDisplay();
@@ -340,8 +348,8 @@ void ScrollAnchorContainer::ApplyAdjustments() {
     return;
   }
 
-  ANCHOR_LOG("Applying anchor adjustment of %d in %s for %p and anchor %p.\n",
-             logicalAdjustment, writingMode.DebugString(), this, mAnchorNode);
+  ANCHOR_LOG("Applying anchor adjustment of %d in %s with anchor %p.\n",
+             logicalAdjustment, writingMode.DebugString(), mAnchorNode);
 
   nsPoint physicalAdjustment;
   switch (writingMode.GetBlockDir()) {