diff --git a/powershell/ql/lib/qlpack.yml b/powershell/ql/lib/qlpack.yml
index 8accccc6390..1632e530e5f 100644
--- a/powershell/ql/lib/qlpack.yml
+++ b/powershell/ql/lib/qlpack.yml
@@ -12,4 +12,8 @@ dependencies:
   codeql/dataflow: ${workspace}
   codeql/ssa: ${workspace}
   codeql/util: ${workspace}
+  codeql/mad: ${workspace}
+dataExtensions:
+  - semmle/code/powershell/frameworks/**/model.yml
+  - semmle/code/powershell/frameworks/**/*.model.yml
 warnOnImplicitThis: true
\ No newline at end of file
diff --git a/powershell/ql/lib/semmle/code/powershell/frameworks/data/empty.model.yml b/powershell/ql/lib/semmle/code/powershell/frameworks/data/empty.model.yml
new file mode 100644
index 00000000000..63cc261eb30
--- /dev/null
+++ b/powershell/ql/lib/semmle/code/powershell/frameworks/data/empty.model.yml
@@ -0,0 +1,32 @@
+extensions:
+  # Make sure that the extensible model predicates have at least one definition
+  # to avoid errors about undefined extensionals.
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: sourceModel
+    data: []
+
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: sinkModel
+    data: []
+
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: summaryModel
+    data: []
+
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: neutralModel
+    data: []
+
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: typeModel
+    data: []
+
+  - addsTo:
+      pack: microsoft-sdl/powershell-all
+      extensible: typeVariableModel
+    data: []