diff --git a/src/java.base/share/man/java.md b/src/java.base/share/man/java.md
index 987dbf64159..1dba3c6ba54 100644
--- a/src/java.base/share/man/java.md
+++ b/src/java.base/share/man/java.md
@@ -2701,7 +2701,12 @@ Java HotSpot VM.
     >   `-XX:ParallelGCThreads=2`
 
 `-XX:+ParallelRefProcEnabled`
-:   Enables parallel reference processing. By default, this option is disabled.
+:   Enables parallel reference processing. By default, collectors employing multiple
+    threads perform parallel reference processing if the number of parallel threads
+    to use is larger than one.
+    The option is available only when the throughput or G1 garbage collector is used
+    (`-XX:+UseParallelGC` or `-XX:+UseG1GC`). Other collectors employing multiple
+    threads always perform reference processing in parallel.
 
 `-XX:+PrintAdaptiveSizePolicy`
 :   Enables printing of information about adaptive-generation sizing. By