diff --git a/Xcode/LLVM.xcodeproj/project.pbxproj b/Xcode/LLVM.xcodeproj/project.pbxproj
index 97f7328..24939d9 100644
--- a/Xcode/LLVM.xcodeproj/project.pbxproj
+++ b/Xcode/LLVM.xcodeproj/project.pbxproj
@@ -142,6 +142,9 @@
 		9F7C240C0CB81ECD00498408 /* analysis_ocaml.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = analysis_ocaml.c; sourceTree = "<group>"; };
 		9F7C240D0CB81ECD00498408 /* llvm_analysis.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = llvm_analysis.ml; sourceTree = "<group>"; };
 		9F7C240E0CB81ECD00498408 /* llvm_analysis.mli */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = llvm_analysis.mli; sourceTree = "<group>"; };
+		9F7C2C4F0CB9496C00498408 /* analysis.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = analysis.ml; sourceTree = "<group>"; };
+		9F7C2C520CB9496C00498408 /* bitwriter.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = bitwriter.ml; sourceTree = "<group>"; };
+		9F7C2C5D0CB9496C00498408 /* vmcore.ml */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = vmcore.ml; sourceTree = "<group>"; };
 		9FA638D90C77B184007F12AE /* AutoUpgrade.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = AutoUpgrade.h; sourceTree = "<group>"; };
 		9FA638DA0C77B184007F12AE /* GlobalAlias.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = GlobalAlias.h; sourceTree = "<group>"; };
 		9FA638DB0C77B1AB007F12AE /* APInt.h */ = {isa = PBXFileReference; fileEncoding = 30; lastKnownFileType = sourcecode.c.h; path = APInt.h; sourceTree = "<group>"; };
@@ -1071,6 +1074,7 @@
 				DE816FAC08CFB44C0093BDEF /* utils */,
 				DE66F38D08ABF35C00323D32 /* docs */,
 				9FD3E56D0CA0116100E54D15 /* bindings */,
+				9F7C2B690CB9496B00498408 /* test */,
 				DE66F3FD08ABF37000323D32 /* examples */,
 				DE66F38C08ABF35300323D32 /* CREDITS.TXT */,
 				CFD99AA80AFE827B0068D19C /* LICENSE.TXT */,
@@ -1170,6 +1174,33 @@
 			path = analysis;
 			sourceTree = "<group>";
 		};
+		9F7C2B690CB9496B00498408 /* test */ = {
+			isa = PBXGroup;
+			children = (
+				9F7C2C4B0CB9496C00498408 /* Bindings */,
+			);
+			name = test;
+			path = ../test;
+			sourceTree = SOURCE_ROOT;
+		};
+		9F7C2C4B0CB9496C00498408 /* Bindings */ = {
+			isa = PBXGroup;
+			children = (
+				9F7C2C4C0CB9496C00498408 /* Ocaml */,
+			);
+			path = Bindings;
+			sourceTree = "<group>";
+		};
+		9F7C2C4C0CB9496C00498408 /* Ocaml */ = {
+			isa = PBXGroup;
+			children = (
+				9F7C2C4F0CB9496C00498408 /* analysis.ml */,
+				9F7C2C520CB9496C00498408 /* bitwriter.ml */,
+				9F7C2C5D0CB9496C00498408 /* vmcore.ml */,
+			);
+			path = Ocaml;
+			sourceTree = "<group>";
+		};
 		9FA638E90C77B252007F12AE /* IPO */ = {
 			isa = PBXGroup;
 			children = (
diff --git a/bindings/ocaml/llvm/llvm.ml b/bindings/ocaml/llvm/llvm.ml
index 0361001..9766d83 100644
--- a/bindings/ocaml/llvm/llvm.ml
+++ b/bindings/ocaml/llvm/llvm.ml
@@ -268,6 +268,9 @@
 external set_visibility : visibility -> llvalue -> unit = "llvm_set_visibility"
 external alignment : llvalue -> int = "llvm_alignment"
 external set_alignment : int -> llvalue -> unit = "llvm_set_alignment"
+external is_global_constant : llvalue -> bool = "llvm_is_global_constant"
+external set_global_constant : bool -> llvalue -> unit
+                             = "llvm_set_global_constant"
 
 (*--... Operations on global variables .....................................--*)
 external declare_global : lltype -> string -> llmodule -> llvalue
diff --git a/bindings/ocaml/llvm/llvm.mli b/bindings/ocaml/llvm/llvm.mli
index d2f6cb4..ae37e9d 100644
--- a/bindings/ocaml/llvm/llvm.mli
+++ b/bindings/ocaml/llvm/llvm.mli
@@ -251,6 +251,9 @@
 external set_visibility : visibility -> llvalue -> unit = "llvm_set_visibility"
 external alignment : llvalue -> int = "llvm_alignment"
 external set_alignment : int -> llvalue -> unit = "llvm_set_alignment"
+external is_global_constant : llvalue -> bool = "llvm_is_global_constant"
+external set_global_constant : bool -> llvalue -> unit
+                             = "llvm_set_global_constant"
 
 (*--... Operations on global variables .....................................--*)
 external declare_global : lltype -> string -> llmodule -> llvalue
diff --git a/bindings/ocaml/llvm/llvm_ocaml.c b/bindings/ocaml/llvm/llvm_ocaml.c
index 4d72182..61115f2 100644
--- a/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/bindings/ocaml/llvm/llvm_ocaml.c
@@ -445,6 +445,17 @@
   return Val_unit;
 }
 
+/* llvalue -> bool */
+CAMLprim value llvm_is_global_constant(LLVMValueRef GlobalVar) {
+  return Val_bool(LLVMIsGlobalConstant(GlobalVar));
+}
+
+/* bool -> llvalue -> unit */
+CAMLprim value llvm_set_global_constant(value Flag, LLVMValueRef GlobalVar) {
+  LLVMSetGlobalConstant(GlobalVar, Bool_val(Flag));
+  return Val_unit;
+}
+
 /*--... Operations on functions ............................................--*/
 
 /* string -> lltype -> llmodule -> llvalue */
diff --git a/include/llvm-c/Core.h b/include/llvm-c/Core.h
index ee1f69f..3f8961b 100644
--- a/include/llvm-c/Core.h
+++ b/include/llvm-c/Core.h
@@ -324,6 +324,8 @@
 void LLVMSetInitializer(LLVMValueRef GlobalVar, LLVMValueRef ConstantVal);
 int LLVMIsThreadLocal(LLVMValueRef GlobalVar);
 void LLVMSetThreadLocal(LLVMValueRef GlobalVar, int IsThreadLocal);
+int LLVMIsGlobalConstant(LLVMValueRef GlobalVar);
+void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, int IsConstant);
 
 /* Operations on functions */
 LLVMValueRef LLVMAddFunction(LLVMModuleRef M, const char *Name,
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index 15a54b3..66ab03c 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -557,6 +557,17 @@
   unwrap<GlobalVariable>(GlobalVar)->setThreadLocal(IsThreadLocal != 0);
 }
 
+int LLVMIsGlobalConstant(LLVMValueRef GlobalVar) {
+  bool res = unwrap<GlobalVariable>(GlobalVar)->isConstant();
+  fprintf(stderr, "LLVMIsConstantGlobal(0x%08x) = %s\n",
+                  (int) GlobalVar, res? "YES" : "NO");
+  return unwrap<GlobalVariable>(GlobalVar)->isConstant();
+}
+
+void LLVMSetGlobalConstant(LLVMValueRef GlobalVar, int IsConstant) {
+  unwrap<GlobalVariable>(GlobalVar)->setConstant(IsConstant != 0);
+}
+
 /*--.. Operations on functions .............................................--*/
 
 LLVMValueRef LLVMAddFunction(LLVMModuleRef M, const char *Name,
diff --git a/test/Bindings/Ocaml/vmcore.ml b/test/Bindings/Ocaml/vmcore.ml
index 0282241..8aa6e43 100644
--- a/test/Bindings/Ocaml/vmcore.ml
+++ b/test/Bindings/Ocaml/vmcore.ml
@@ -418,7 +418,15 @@
    *)
   group "delete";
   let g = define_global "GVar05" fourty_two32 m in
-  delete_global g
+  delete_global g;
+
+  (* RUN: grep -v {ConstGlobalVar.*constant} < %t.ll
+   *)
+  group "constant";
+  let g = define_global "ConstGlobalVar" fourty_two32 m in
+  insist (not (is_global_constant g));
+  set_global_constant true g;
+  insist (is_global_constant g)
 
 
 (*===-- Functions ---------------------------------------------------------===*)