diff --git a/python/ionpy/native.py b/python/ionpy/native.py
index 944a9192..4110a26f 100644
--- a/python/ionpy/native.py
+++ b/python/ionpy/native.py
@@ -7,6 +7,7 @@
 if platform.system() == 'Windows':
     ion_core_module = os.path.join(pre_built_path, 'windows/ion-core.dll')
     ion_bb_module = os.path.join(pre_built_path, 'windows/ion-bb.dll')
+    os.environ["PATH"] = '{};'.format(os.path.join(pre_built_path, 'windows')) + os.environ["PATH"]
     os.add_dll_directory(os.path.join(pre_built_path, 'windows'))
 elif platform.system() == 'Darwin':
     ion_core_module = os.path.join(pre_built_path, 'macos/libion-core.dylib')