diff --git a/src/librustc_llvm/lib.rs b/src/librustc_llvm/lib.rs
index e757201c886..f14df2a7b48 100644
--- a/src/librustc_llvm/lib.rs
+++ b/src/librustc_llvm/lib.rs
@@ -226,7 +226,7 @@ impl Attributes {
 
     pub fn apply_callsite(&self, idx: usize, callsite: ValueRef) {
         unsafe {
-            LLVMAddCallSiteAttribute(callsite, idx as c_uint, self.regular.bits());
+            LLVMRustAddCallSiteAttribute(callsite, idx as c_uint, self.regular.bits());
             if self.dereferenceable_bytes != 0 {
                 LLVMAddDereferenceableCallSiteAttr(callsite, idx as c_uint,
                                                    self.dereferenceable_bytes);
@@ -1056,7 +1056,7 @@ extern {
     pub fn LLVMSetInstrParamAlignment(Instr: ValueRef,
                                       index: c_uint,
                                       align: c_uint);
-    pub fn LLVMAddCallSiteAttribute(Instr: ValueRef,
+    pub fn LLVMRustAddCallSiteAttribute(Instr: ValueRef,
                                     index: c_uint,
                                     Val: uint64_t);
     pub fn LLVMAddDereferenceableCallSiteAttr(Instr: ValueRef,
@@ -1561,7 +1561,7 @@ extern {
                                 Alignment: c_uint)
                                 -> ValueRef;
 
-    pub fn LLVMBuildAtomicCmpXchg(B: BuilderRef,
+    pub fn LLVMRustBuildAtomicCmpXchg(B: BuilderRef,
                                   LHS: ValueRef,
                                   CMP: ValueRef,
                                   RHS: ValueRef,
diff --git a/src/librustc_trans/builder.rs b/src/librustc_trans/builder.rs
index e88257dcd4c..7495f2b753b 100644
--- a/src/librustc_trans/builder.rs
+++ b/src/librustc_trans/builder.rs
@@ -1083,7 +1083,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                          failure_order: AtomicOrdering,
                          weak: llvm::Bool) -> ValueRef {
         unsafe {
-            llvm::LLVMBuildAtomicCmpXchg(self.llbuilder, dst, cmp, src,
+            llvm::LLVMRustBuildAtomicCmpXchg(self.llbuilder, dst, cmp, src,
                                          order, failure_order, weak)
         }
     }
diff --git a/src/rustllvm/RustWrapper.cpp b/src/rustllvm/RustWrapper.cpp
index fadd95c9a72..bc38245d351 100644
--- a/src/rustllvm/RustWrapper.cpp
+++ b/src/rustllvm/RustWrapper.cpp
@@ -99,7 +99,7 @@ extern "C" LLVMTypeRef LLVMMetadataTypeInContext(LLVMContextRef C) {
   return wrap(Type::getMetadataTy(*unwrap(C)));
 }
 
-extern "C" void LLVMAddCallSiteAttribute(LLVMValueRef Instr, unsigned index, uint64_t Val) {
+extern "C" void LLVMRustAddCallSiteAttribute(LLVMValueRef Instr, unsigned index, uint64_t Val) {
   CallSite Call = CallSite(unwrap<Instruction>(Instr));
   AttrBuilder B;
   B.addRawValue(Val);
@@ -203,7 +203,7 @@ extern "C" LLVMValueRef LLVMBuildAtomicStore(LLVMBuilderRef B,
     return wrap(unwrap(B)->Insert(si));
 }
 
-extern "C" LLVMValueRef LLVMBuildAtomicCmpXchg(LLVMBuilderRef B,
+extern "C" LLVMValueRef LLVMRustBuildAtomicCmpXchg(LLVMBuilderRef B,
                                                LLVMValueRef target,
                                                LLVMValueRef old,
                                                LLVMValueRef source,