diff --git a/mode/consolemini.py b/mode/consolemini.py
index f16e2e0..cafbd9a 100644
--- a/mode/consolemini.py
+++ b/mode/consolemini.py
@@ -4,6 +4,8 @@ from lex import Grammar, PatternRule
 from mode.python import PythonGrammar
 from point import Point
 
+LIMIT = 79
+
 class ConsoleExec(method.Method):
     def _execute(self, w, **vargs):
         s = w.buffer.make_string()
@@ -57,7 +59,21 @@ class ConsoleExec(method.Method):
             newlines = ['   %s' % x for x in output.split('\n')]
             assert newlines[-1] == '   '
             newlines[-1] = ''
-            b.insert_lines(b.get_buffer_end(), newlines, force=True)
+            newlines2 = []
+            for line in newlines:
+                i = 0
+                while i + LIMIT < len(line):
+                    j = LIMIT
+                    while j > 0 and line[i + j] != ' ':
+                        j -= 1
+                    if j == 0:
+                        newlines2.append(line[i:i + LIMIT])
+                        i += j
+                    else:
+                        newlines2.append(line[i:i + j])
+                        i += j + 1
+                newlines2.append(line[i:])
+            b.insert_lines(b.get_buffer_end(), newlines2, force=True)
         for w2 in b.windows:
             w2.goto_end()