diff --git a/jedi/imports.py b/jedi/imports.py
index de0af587..7563dcdb 100644
--- a/jedi/imports.py
+++ b/jedi/imports.py
@@ -151,10 +151,11 @@ class ImportPath(parsing.Base):
         # sys.path. Therefore look if gunicorn is a parent directory, #56.
         parts = self.file_path.split(os.path.sep)
         in_path = []
-        for i, p in enumerate(parts):
-            if p == self.import_path[0]:
-                new = os.path.sep.join(parts[:i])
-                in_path.append(new)
+        if self.import_path:
+            for i, p in enumerate(parts):
+                if p == self.import_path[0]:
+                    new = os.path.sep.join(parts[:i])
+                    in_path.append(new)
 
         module = self.import_stmt.get_parent_until()
         return in_path + modules.sys_path_with_modifications(module)