diff --git a/README b/README
index 75273db54..e09388326 100644
--- a/README
+++ b/README
@@ -428,7 +428,8 @@ For further documentation, see the `pandoc(1)` man page.
     `.ris` (RIS format), `.enl` (EndNote format),
     `.xml` (EndNote XML format), `.wos` (ISI format),
     `.medline` (MEDLINE format), `.copac` (Copac format),
-    or `.json` (citeproc JSON).
+    or `.json` (citeproc JSON).  If you want to use multiple
+    bibliographies, just use this option repeatedly.
 
 `--csl`*=FILE*
 :   specifies [CSL] style to be used in formatting citations and
diff --git a/man/man1/pandoc.1.md b/man/man1/pandoc.1.md
index 81a697823..0aa47045f 100644
--- a/man/man1/pandoc.1.md
+++ b/man/man1/pandoc.1.md
@@ -276,7 +276,8 @@ should pipe input and output through `iconv`:
     `.ris` (RIS format), `.enl` (EndNote format),
     `.xml` (EndNote XML format), `.wos` (ISI format),
     `.medline` (MEDLINE format), `.copac` (Copac format),
-    or `.json` (citeproc JSON).
+    or `.json` (citeproc JSON).  If you want to use multiple
+    bibliographies, just use this option repeatedly.
 
 \--csl=*FILE*
 :   Specify [CSL] style to be used in formatting citations and