diff --git a/llvm/bindings/ocaml/llvm/llvm.ml b/llvm/bindings/ocaml/llvm/llvm.ml
index e5ffd59599f8..1bf91f451861 100644
--- a/llvm/bindings/ocaml/llvm/llvm.ml
+++ b/llvm/bindings/ocaml/llvm/llvm.ml
@@ -529,7 +529,8 @@ external const_trunc_or_bitcast : llvalue -> lltype -> llvalue
                               = "LLVMConstTruncOrBitCast"
 external const_pointercast : llvalue -> lltype -> llvalue
                            = "LLVMConstPointerCast"
-external const_intcast : llvalue -> lltype -> llvalue = "LLVMConstIntCast"
+external const_intcast : llvalue -> lltype -> is_signed:bool -> llvalue
+                       = "llvm_const_intcast"
 external const_fpcast : llvalue -> lltype -> llvalue = "LLVMConstFPCast"
 external const_select : llvalue -> llvalue -> llvalue -> llvalue
                       = "LLVMConstSelect"
diff --git a/llvm/bindings/ocaml/llvm/llvm.mli b/llvm/bindings/ocaml/llvm/llvm.mli
index 8d08c0a83b4b..f70fd60b34fe 100644
--- a/llvm/bindings/ocaml/llvm/llvm.mli
+++ b/llvm/bindings/ocaml/llvm/llvm.mli
@@ -1118,10 +1118,12 @@ val const_trunc_or_bitcast : llvalue -> lltype -> llvalue
     See the method [llvm::ConstantExpr::getPointerCast]. *)
 val const_pointercast : llvalue -> lltype -> llvalue
 
-(** [const_intcast c ty] returns a constant zext, bitcast, or trunc for integer
-    -> integer casts of constant [c] to type [ty].
-    See the method [llvm::ConstantExpr::getIntCast]. *)
-val const_intcast : llvalue -> lltype -> llvalue
+(** [const_intcast c ty ~is_signed] returns a constant sext/zext, bitcast,
+    or trunc for integer -> integer casts of constant [c] to type [ty].
+    When converting a narrower value to a wider one, whether sext or zext
+    will be used is controlled by [is_signed].
+    See the method [llvm::ConstantExpr::getIntegerCast]. *)
+val const_intcast : llvalue -> lltype -> is_signed:bool -> llvalue
 
 (** [const_fpcast c ty] returns a constant fpext, bitcast, or fptrunc for fp ->
     fp casts of constant [c] to type [ty].
diff --git a/llvm/bindings/ocaml/llvm/llvm_ocaml.c b/llvm/bindings/ocaml/llvm/llvm_ocaml.c
index 46c170b44f34..e7ebde26efc0 100644
--- a/llvm/bindings/ocaml/llvm/llvm_ocaml.c
+++ b/llvm/bindings/ocaml/llvm/llvm_ocaml.c
@@ -771,6 +771,12 @@ CAMLprim LLVMValueRef llvm_const_in_bounds_gep(LLVMValueRef ConstantVal,
                               Wosize_val(Indices));
 }
 
+/* llvalue -> lltype -> is_signed:bool -> llvalue */
+CAMLprim LLVMValueRef llvm_const_intcast(LLVMValueRef CV, LLVMTypeRef T,
+                                         value IsSigned) {
+  return LLVMConstIntCast(CV, T, Bool_val(IsSigned));
+}
+
 /* llvalue -> int array -> llvalue */
 CAMLprim LLVMValueRef llvm_const_extractvalue(LLVMValueRef Aggregate,
                                               value Indices) {
diff --git a/llvm/test/Bindings/Ocaml/vmcore.ml b/llvm/test/Bindings/Ocaml/vmcore.ml
index 4233661e1718..4c119c0f7c38 100644
--- a/llvm/test/Bindings/Ocaml/vmcore.ml
+++ b/llvm/test/Bindings/Ocaml/vmcore.ml
@@ -286,6 +286,7 @@ let test_constants () =
    * CHECK: const_ptrtoint{{.*}}ptrtoint
    * CHECK: const_inttoptr{{.*}}inttoptr
    * CHECK: const_bitcast{{.*}}bitcast
+   * CHECK: const_intcast{{.*}}zext
    *)
   let i128_type = integer_type context 128 in
   ignore (define_global "const_trunc" (const_trunc (const_add foldbomb five)
@@ -305,6 +306,8 @@ let test_constants () =
   ignore (define_global "const_inttoptr" (const_inttoptr (const_add foldbomb five)
                                                   void_ptr) m);
   ignore (define_global "const_bitcast" (const_bitcast ffoldbomb i64_type) m);
+  ignore (define_global "const_intcast"
+          (const_intcast foldbomb i128_type ~is_signed:false) m);
   
   group "misc constants";
   (* CHECK: const_size_of{{.*}}getelementptr{{.*}}null