diff --git a/.travis.yml b/.travis.yml
index cc93b1127c3a7..b85737dc97d7d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,7 +12,7 @@ before_install:
   - echo 'deb http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.7 main' | sudo tee -a /etc/apt/sources.list
   - echo 'deb-src http://llvm.org/apt/trusty/ llvm-toolchain-trusty-3.7 main' | sudo tee -a /etc/apt/sources.list
   - sudo apt-get update
-  - sudo apt-get --force-yes install curl make g++ python2.7 git zlib1g-dev libedit-dev llvm-3.7-tools
+  - sudo apt-get --force-yes install curl make g++ python2.7 git zlib1g-dev libedit-dev llvm-3.7-tools gdb lldb-3.7
 
 script:
   - ./configure --llvm-root=/usr/lib/llvm-3.7
diff --git a/src/etc/debugger_pretty_printers_common.py b/src/etc/debugger_pretty_printers_common.py
index 06a83c75936fe..b2bb7859661ab 100644
--- a/src/etc/debugger_pretty_printers_common.py
+++ b/src/etc/debugger_pretty_printers_common.py
@@ -139,7 +139,7 @@ def __classify_struct(self):
             return TYPE_KIND_STR_SLICE
 
         # REGULAR SLICE
-        if (unqualified_type_name.startswith("&[") and
+        if (unqualified_type_name.startswith(("&[", "&mut [")) and
             unqualified_type_name.endswith("]") and
             self.__conforms_to_field_layout(SLICE_FIELD_NAMES)):
             return TYPE_KIND_SLICE
diff --git a/src/test/debuginfo/vec-slices.rs b/src/test/debuginfo/vec-slices.rs
index 0d396c885eb85..4b61ef804bbee 100644
--- a/src/test/debuginfo/vec-slices.rs
+++ b/src/test/debuginfo/vec-slices.rs
@@ -76,6 +76,9 @@
 // lldb-command:print padded_struct
 // lldb-check:[...]$5 = &[AStruct { x: 10, y: 11, z: 12 }, AStruct { x: 13, y: 14, z: 15 }]
 
+// lldb-command:print 'vec_slices::MUT_VECT_SLICE'
+// lldb-check:[...]$6 = &mut [64, 65]
+
 #![allow(dead_code, unused_variables)]
 #![feature(omit_gdb_pretty_printer_section)]
 #![omit_gdb_pretty_printer_section]