diff --git a/checker/src/main/java/org/checkerframework/checker/initialization/InitializationChecker.java b/checker/src/main/java/org/checkerframework/checker/initialization/InitializationChecker.java
index 477ccba52b8..9faed6e19b8 100644
--- a/checker/src/main/java/org/checkerframework/checker/initialization/InitializationChecker.java
+++ b/checker/src/main/java/org/checkerframework/checker/initialization/InitializationChecker.java
@@ -23,9 +23,10 @@ protected InitializationChecker() {}
     @Override
     public SortedSet<String> getSuppressWarningsPrefixes() {
         SortedSet<String> result = super.getSuppressWarningsPrefixes();
-        // The SuppressesWarnings string "initialization" is not useful here: it suppresses *all*
-        // warnings, not just those related to initialization.  Instead, if the user writes
-        // @SuppressWarnings("initialization"), let that match keys containing that string.
+        // "fbc" is for backward compatibility only.  Note that the SuppressesWarnings strings
+        // "initialization" and "fbc" suppress *all* warnings, not just those related to
+        // initialization.  See manual section
+        // https://checkerframework.org/manual/#initialization-checking-suppressing-warnings .
         result.add("fbc");
         return result;
     }
diff --git a/docs/manual/nullness-checker.tex b/docs/manual/nullness-checker.tex
index cc4c7a2d3f5..eee0a84317a 100644
--- a/docs/manual/nullness-checker.tex
+++ b/docs/manual/nullness-checker.tex
@@ -2018,11 +2018,11 @@
 \subsectionAndLabel{Suppressing warnings}{initialization-checking-suppressing-warnings}
 
 To suppress most warnings related to partially-initialized values, use the
-warning suppression string ``initialization.''~(note the trailing period)
-or ``fbc''.  You can write \<@SuppressWarnings("initialization.")> or
-\<@SuppressWarnings("fbc")> on a field, constructor, or
+warning suppression string ``initialization.''~(note the trailing period).
+You can write \<@SuppressWarnings("initialization.")>
+on a field, constructor, or
 class, or pass the command-line argument
-\<-AsuppressWarnings=initialization.>~or \<-AsuppressWarnings=fbc> when
+\<-AsuppressWarnings=initialization.> when
 running the Nullness Checker.
 (For more about suppressing warnings, see
 \chapterpageref{suppressing-warnings}).  You will no longer get a guarantee
@@ -2087,7 +2087,7 @@
 % LocalWords:  typeofthis nraB nrbB rO nroO nroB containsKey enum NullAway
 % LocalWords:  JUnit's field1 field2 superclasses Foo C1 C2 PolyRaw type''
 % LocalWords:  NullnessChecker redundantNullComparison instanceof runtime
-% LocalWords:  noInitForMonotonicNonNull UnknownInitialization isArray fbc
+% LocalWords:  noInitForMonotonicNonNull UnknownInitialization isArray
 % LocalWords:  UnderInitialization getComponentType AsuppressWarnings
 % LocalWords:  isEmpty AssumeAssertion cleanroom varargs OtherClass Astubs
 % LocalWords:  mymap mykey KeyType ValueType lineSeparator receiver''