diff --git a/lib/Target/TargetLoweringObjectFile.cpp b/lib/Target/TargetLoweringObjectFile.cpp
index 166f1201781..a42911d92b9 100644
--- a/lib/Target/TargetLoweringObjectFile.cpp
+++ b/lib/Target/TargetLoweringObjectFile.cpp
@@ -340,7 +340,10 @@ getSectionFlagsAsString(SectionKind Kind, SmallVectorImpl<char> &Str) const {
     Str.push_back('x');
   if (Kind.isWriteable())
     Str.push_back('w');
-  if (Kind.isMergeableConst() || Kind.isMergeableCString())
+  if (Kind.isMergeableCString() ||
+      Kind.isMergeableConst4() ||
+      Kind.isMergeableConst8() ||
+      Kind.isMergeableConst16())
     Str.push_back('M');
   if (Kind.isMergeableCString())
     Str.push_back('S');
diff --git a/test/CodeGen/X86/global-sections.ll b/test/CodeGen/X86/global-sections.ll
index 18a585a9836..a674a3ee97b 100644
--- a/test/CodeGen/X86/global-sections.ll
+++ b/test/CodeGen/X86/global-sections.ll
@@ -68,3 +68,20 @@
 ; DARWIN: .globl	"_foo bar"
 ; DARWIN:	.weak_definition "_foo bar"
 ; DARWIN: "_foo bar":
+
+; PR4650
+@G6 = weak_odr constant [1 x i8] c"\01"
+
+; LINUX:   .type	G6,@object
+; LINUX:   .section	.gnu.linkonce.r.G6,"a",@progbits
+; LINUX:   .weak	G6
+; LINUX: G6:				# G6
+; LINUX:   .size	G6, 1
+; LINUX:   .ascii	"\001"
+
+; DARWIN:  .section __TEXT,__const_coal,coalesced
+; DARWIN:  .globl _G6
+; DARWIN:  .weak_definition _G6
+; DARWIN:_G6:
+; DARWIN:  .ascii "\001"
+