diff --git a/src/mono/mono/metadata/icall-def.h b/src/mono/mono/metadata/icall-def.h
index ad7044a08439f..c6e2b73218a83 100644
--- a/src/mono/mono/metadata/icall-def.h
+++ b/src/mono/mono/metadata/icall-def.h
@@ -555,7 +555,6 @@ ICALL_TYPE(ILOCK, "System.Threading.Interlocked", ILOCK_1)
 NOHANDLES(ICALL(ILOCK_1, "Add(int&,int)", ves_icall_System_Threading_Interlocked_Add_Int))
 NOHANDLES(ICALL(ILOCK_2, "Add(long&,long)", ves_icall_System_Threading_Interlocked_Add_Long))
 NOHANDLES(ICALL(ILOCK_5, "CompareExchange(int&,int,int)", ves_icall_System_Threading_Interlocked_CompareExchange_Int))
-NOHANDLES(ICALL(ILOCK_6, "CompareExchange(int&,int,int,bool&)", ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success))
 NOHANDLES(ICALL(ILOCK_8, "CompareExchange(long&,long,long)", ves_icall_System_Threading_Interlocked_CompareExchange_Long))
 NOHANDLES(ICALL(ILOCK_9, "CompareExchange(object&,object&,object&,object&)", ves_icall_System_Threading_Interlocked_CompareExchange_Object))
 NOHANDLES(ICALL(ILOCK_11, "Decrement(int&)", ves_icall_System_Threading_Interlocked_Decrement_Int))
diff --git a/src/mono/mono/metadata/threads-types.h b/src/mono/mono/metadata/threads-types.h
index c92e61497dba6..da86f3a15d880 100644
--- a/src/mono/mono/metadata/threads-types.h
+++ b/src/mono/mono/metadata/threads-types.h
@@ -148,9 +148,6 @@ void ves_icall_System_Threading_Interlocked_Exchange_Object (MonoObject *volatil
 ICALL_EXPORT
 gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *location, gint32 value, gint32 comparand);
 
-ICALL_EXPORT
-gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success);
-
 ICALL_EXPORT
 gint64 ves_icall_System_Threading_Interlocked_CompareExchange_Long(gint64 *location, gint64 value, gint64 comparand);
 
diff --git a/src/mono/mono/metadata/threads.c b/src/mono/mono/metadata/threads.c
index 22a7760450e84..11fb393d77067 100644
--- a/src/mono/mono/metadata/threads.c
+++ b/src/mono/mono/metadata/threads.c
@@ -2199,16 +2199,6 @@ gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int(gint32 *locati
 	return mono_atomic_cas_i32(location, value, comparand);
 }
 
-gint32 ves_icall_System_Threading_Interlocked_CompareExchange_Int_Success(gint32 *location, gint32 value, gint32 comparand, MonoBoolean *success)
-{
-	if (G_UNLIKELY (!location))
-		return (gint32)set_pending_null_reference_exception ();
-
-	gint32 r = mono_atomic_cas_i32(location, value, comparand);
-	*success = r == comparand;
-	return r;
-}
-
 void
 ves_icall_System_Threading_Interlocked_CompareExchange_Object (MonoObject *volatile*location, MonoObject *volatile*value, MonoObject *volatile*comparand, MonoObject *volatile* res)
 {
diff --git a/src/mono/mono/mini/intrinsics.c b/src/mono/mono/mini/intrinsics.c
index b994a01c48745..402d58b3c7651 100644
--- a/src/mono/mono/mini/intrinsics.c
+++ b/src/mono/mono/mini/intrinsics.c
@@ -1722,39 +1722,6 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
 			if (cfg->gen_write_barriers && is_ref)
 				mini_emit_write_barrier (cfg, args [0], args [1]);
 		}
-		else if ((strcmp (cmethod->name, "CompareExchange") == 0) && fsig->param_count == 4 &&
-		         fsig->params [1]->type == MONO_TYPE_I4) {
-			MonoInst *cmp, *ceq;
-
-			if (!mono_arch_opcode_supported (OP_ATOMIC_CAS_I4))
-				return NULL;
-
-			/* int32 r = CAS (location, value, comparand); */
-			MONO_INST_NEW (cfg, ins, OP_ATOMIC_CAS_I4);
-			ins->dreg = alloc_ireg (cfg);
-			ins->sreg1 = args [0]->dreg;
-			ins->sreg2 = args [1]->dreg;
-			ins->sreg3 = args [2]->dreg;
-			ins->type = STACK_I4;
-			MONO_ADD_INS (cfg->cbb, ins);
-
-			/* bool result = r == comparand; */
-			MONO_INST_NEW (cfg, cmp, OP_ICOMPARE);
-			cmp->sreg1 = ins->dreg;
-			cmp->sreg2 = args [2]->dreg;
-			cmp->type = STACK_I4;
-			MONO_ADD_INS (cfg->cbb, cmp);
-
-			MONO_INST_NEW (cfg, ceq, OP_ICEQ);
-			ceq->dreg = alloc_ireg (cfg);
-			ceq->type = STACK_I4;
-			MONO_ADD_INS (cfg->cbb, ceq);
-
-			/* *success = result; */
-			MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STOREI1_MEMBASE_REG, args [3]->dreg, 0, ceq->dreg);
-
-			cfg->has_atomic_cas_i4 = TRUE;
-		}
 		else if (strcmp (cmethod->name, "MemoryBarrier") == 0 && fsig->param_count == 0)
 			ins = mini_emit_memory_barrier (cfg, MONO_MEMORY_BARRIER_SEQ);