diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index a80cfc4b256..3b25714c04b 100644
--- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -518,12 +518,13 @@ void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
                                    SectionKind::getText());
   ConstTextCoalSection
     = getContext().getMachOSection("__TEXT", "__const_coal", 
-                                   MCSectionMachO::S_COALESCED,
+                                   MCSectionMachO::S_COALESCED |
+                                   MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
                                    SectionKind::getText());
   ConstDataCoalSection
     = getContext().getMachOSection("__DATA","__const_coal",
                                    MCSectionMachO::S_COALESCED,
-                                   SectionKind::getText());
+                                   SectionKind::getReadOnly());
   ConstDataSection  // .const_data
     = getContext().getMachOSection("__DATA", "__const", 0,
                                    SectionKind::getReadOnlyWithRel());
diff --git a/test/CodeGen/X86/global-sections.ll b/test/CodeGen/X86/global-sections.ll
index 6d211913b01..2d8f429eff6 100644
--- a/test/CodeGen/X86/global-sections.ll
+++ b/test/CodeGen/X86/global-sections.ll
@@ -20,7 +20,7 @@
 
 ; TODO: linux drops this into .rodata, we drop it into ".gnu.linkonce.r.G2"
 
-; DARWIN: .section __TEXT,__const_coal,coalesced
+; DARWIN: .section __TEXT,__const_coal,coalesced,pure_instructions
 ; DARWIN: _G2:
 ; DARWIN:    .long 42
 
@@ -85,7 +85,7 @@
 ; LINUX:   .byte	1
 ; LINUX:   .size	G6, 1
 
-; DARWIN:  .section __TEXT,__const_coal,coalesced
+; DARWIN:  .section __TEXT,__const_coal,coalesced,pure_instructions
 ; DARWIN:  .globl _G6
 ; DARWIN:  .weak_definition _G6
 ; DARWIN:_G6: