diff --git a/IPython/lib/inputhookglut.py b/IPython/lib/inputhookglut.py
index e6f7f12..9fc29bd 100644
--- a/IPython/lib/inputhookglut.py
+++ b/IPython/lib/inputhookglut.py
@@ -63,7 +63,7 @@ if sys.platform == 'darwin':
             )
     except AttributeError:
         raise RuntimeError(
-            '''Your glut implementation does not allow interactive sessions'''
+            '''Your glut implementation does not allow interactive sessions. '''
             '''Consider installing freeglut.''')
     glutMainLoopEvent = glutCheckLoop
 elif glut.HAVE_FREEGLUT:
diff --git a/IPython/terminal/pt_inputhooks/glut.py b/IPython/terminal/pt_inputhooks/glut.py
index f6d54a5..d26f91c 100644
--- a/IPython/terminal/pt_inputhooks/glut.py
+++ b/IPython/terminal/pt_inputhooks/glut.py
@@ -46,7 +46,7 @@ if sys.platform == 'darwin':
             )
     except AttributeError:
         raise RuntimeError(
-            '''Your glut implementation does not allow interactive sessions'''
+            '''Your glut implementation does not allow interactive sessions. '''
             '''Consider installing freeglut.''')
     glutMainLoopEvent = glutCheckLoop
 elif glut.HAVE_FREEGLUT: