diff --git a/pandas/__init__.py b/pandas/__init__.py
index 11ea3047bb62a..eba67884d5037 100644
--- a/pandas/__init__.py
+++ b/pandas/__init__.py
@@ -10,12 +10,13 @@
     try:
         __import__(dependency)
     except ImportError as e:
-        missing_dependencies.append((dependency, e))
+        missing_dependencies.append(
+            "\n{0}: {1}".format(dependency, str(e))
+        )
 
 if missing_dependencies:
     msg = "Unable to import required dependencies:"
-    for dependency, e in missing_dependencies:
-        msg += "\n{0}: {1}".format(dependency, str(e))
+    msg += "".join(missing_dependencies)
     raise ImportError(msg)
 del hard_dependencies, dependency, missing_dependencies