diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 8a6caa9b10854..aad4cbc11a417 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -1512,12 +1512,19 @@ extern "C" void LLVMRustComputeLTOCacheKey(RustStringRef KeyOut,
   DenseSet<GlobalValue::GUID> CfiFunctionDecls;
 
   // Based on the 'InProcessThinBackend' constructor in LLVM
+#if LLVM_VERSION_GE(23, 0)
+  CfiFunctionDefs.insert_range(
+      Data->Index.cfiFunctionDefs().getExportedThinLTOGUIDs());
+  CfiFunctionDecls.insert_range(
+      Data->Index.cfiFunctionDecls().getExportedThinLTOGUIDs());
+#else
   for (auto &Name : Data->Index.cfiFunctionDefs().symbols())
     CfiFunctionDefs.insert(GlobalValue::getGUIDAssumingExternalLinkage(
         GlobalValue::dropLLVMManglingEscape(Name)));
   for (auto &Name : Data->Index.cfiFunctionDecls().symbols())
     CfiFunctionDecls.insert(GlobalValue::getGUIDAssumingExternalLinkage(
         GlobalValue::dropLLVMManglingEscape(Name)));
+#endif
 
   Key = llvm::computeLTOCacheKey(conf, Data->Index, ModId, ImportList,
                                  ExportList, ResolvedODR, DefinedGlobals,