diff --git a/pyinstaller/extrahooks/hook-casadi.py b/pyinstaller/extrahooks/hook-casadi.py
new file mode 100644
index 0000000..47db8b1
--- /dev/null
+++ b/pyinstaller/extrahooks/hook-casadi.py
@@ -0,0 +1,9 @@
+# hook-casadi.py
+from PyInstaller.utils.hooks import collect_dynamic_libs
+
+binaries = collect_dynamic_libs('casadi')
+
+# Something about legacy import codepaths in casadi.casadi causes PyInstaller's analysis to pick up
+# casadi._casadi as a top-level _casadi module, which is wrong.
+hiddenimports = ['casadi._casadi']
+excludedimports = ['_casadi']