diff --git a/ports/llvm/0009-add-missing-typename.patch b/ports/llvm/0009-add-missing-typename.patch
new file mode 100644
index 0000000000..50fd603d7f
--- /dev/null
+++ b/ports/llvm/0009-add-missing-typename.patch
@@ -0,0 +1,13 @@
+diff --git a/llvm/tools/dsymutil/DwarfLinkerForBinary.cpp b/llvm/tools/dsymutil/DwarfLinkerForBinary.cpp
+index 4b281d5f1..0a008ab9b 100644
+--- a/llvm/tools/dsymutil/DwarfLinkerForBinary.cpp
++++ b/llvm/tools/dsymutil/DwarfLinkerForBinary.cpp
+@@ -951,7 +951,7 @@ std::vector<
+ DwarfLinkerForBinary::AddressManager<AddressesMapBase>::getRelocations(
+     const std::vector<ValidReloc> &Relocs, uint64_t StartPos, uint64_t EndPos) {
+   std::vector<
+-      DwarfLinkerForBinary::AddressManager<AddressesMapBase>::ValidReloc>
++      typename DwarfLinkerForBinary::AddressManager<AddressesMapBase>::ValidReloc>
+       Res;
+ 
+   auto CurReloc = partition_point(Relocs, [StartPos](const ValidReloc &Reloc) {
diff --git a/ports/llvm/portfile.cmake b/ports/llvm/portfile.cmake
index 41716fdcf6..a79c72a590 100644
--- a/ports/llvm/portfile.cmake
+++ b/ports/llvm/portfile.cmake
@@ -15,6 +15,7 @@ vcpkg_from_github(
         0006-create-destination-mlir-directory.patch
         0007-fix-compiler-rt-warnings.patch # fixed in upstream
         0008-add-missing-case.patch # From upstream https://github.com/llvm/llvm-project/pull/72401
+        0009-add-missing-typename.patch # Fixed in version 18.1.0 and later
 )
 
 vcpkg_check_features(
diff --git a/ports/llvm/vcpkg.json b/ports/llvm/vcpkg.json
index dfa1805d82..3bfc831eb5 100644
--- a/ports/llvm/vcpkg.json
+++ b/ports/llvm/vcpkg.json
@@ -1,7 +1,7 @@
 {
   "name": "llvm",
   "version": "17.0.2",
-  "port-version": 4,
+  "port-version": 5,
   "description": "The LLVM Compiler Infrastructure.",
   "homepage": "https://llvm.org",
   "license": "Apache-2.0",
diff --git a/versions/baseline.json b/versions/baseline.json
index 9a1a6bd8bb..7306f6b43e 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -5382,7 +5382,7 @@
     },
     "llvm": {
       "baseline": "17.0.2",
-      "port-version": 4
+      "port-version": 5
     },
     "lmdb": {
       "baseline": "0.9.31",
diff --git a/versions/l-/llvm.json b/versions/l-/llvm.json
index bbbe27eabf..03ea923e9b 100644
--- a/versions/l-/llvm.json
+++ b/versions/l-/llvm.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "3782c35ec8e69e728302f4adeb98dd21d7452fce",
+      "version": "17.0.2",
+      "port-version": 5
+    },
     {
       "git-tree": "9b38326a02fb44545071f8a4ee72ca3e2bc9bd8e",
       "version": "17.0.2",