diff --git a/pkgs/by-name/co/collabora-online/add-missing-poco-includes.patch b/pkgs/by-name/co/collabora-online/add-missing-poco-includes.patch
new file mode 100644
index 00000000000000..f1e79aea02b51d
--- /dev/null
+++ b/pkgs/by-name/co/collabora-online/add-missing-poco-includes.patch
@@ -0,0 +1,17 @@
+diff --git a/common/JsonUtil.hpp b/common/JsonUtil.hpp
+index 564812e0e6..b7eb8fe0b4 100644
+--- a/common/JsonUtil.hpp
++++ b/common/JsonUtil.hpp
+@@ -23,6 +23,7 @@
+ #include <Poco/Dynamic/Var.h>
+ #include <Poco/JSON/Object.h>
+ #include <Poco/JSON/Parser.h>
++#include <Poco/JSON/JSONException.h>
+
+ namespace JsonUtil
+ {
+@@ -248,4 +249,3 @@ inline std::string escapeJSONValue(std::string val)
+ } // end namespace JsonUtil
+
+ /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
+-
diff --git a/pkgs/by-name/co/collabora-online/package.nix b/pkgs/by-name/co/collabora-online/package.nix
index 62c33c455c3271..1d867eb6f3ffb2 100644
--- a/pkgs/by-name/co/collabora-online/package.nix
+++ b/pkgs/by-name/co/collabora-online/package.nix
@@ -63,7 +63,12 @@ stdenv.mkDerivation (finalAttrs: {
     "--with-lokit-path=${libreoffice-collabora.src}/include"
   ];
 
-  patches = [ ./fix-file-server-regex.patch ];
+  patches = [
+    ./fix-file-server-regex.patch
+    # Work around missing includes in upstream
+    # https://github.com/CollaboraOnline/online/issues/11175
+    ./add-missing-poco-includes.patch
+  ];
 
   postPatch = ''
     cp ${./package-lock.json} ${finalAttrs.npmRoot}/package-lock.json