diff --git a/ports/monkeys-audio/fix-C2471.patch b/ports/monkeys-audio/fix-C2471.patch
new file mode 100644
index 0000000000..2fb16d81d3
--- /dev/null
+++ b/ports/monkeys-audio/fix-C2471.patch
@@ -0,0 +1,13 @@
+diff --git a/Source/Projects/VS2019/MACDll/MACDll.vcxproj b/Source/Projects/VS2019/MACDll/MACDll.vcxproj
+index 0fcfc94..c0caf12 100644
+--- a/Source/Projects/VS2019/MACDll/MACDll.vcxproj
++++ b/Source/Projects/VS2019/MACDll/MACDll.vcxproj
+@@ -108,7 +108,7 @@
+       <TreatWChar_tAsBuiltInType>false</TreatWChar_tAsBuiltInType>
+       <PrecompiledHeader>Use</PrecompiledHeader>
+       <WarningLevel>Level3</WarningLevel>
+-      <DebugInformationFormat>EditAndContinue</DebugInformationFormat>
++      <DebugInformationFormat>OldStyle</DebugInformationFormat>
+     </ClCompile>
+     <ResourceCompile>
+       <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
diff --git a/ports/monkeys-audio/portfile.cmake b/ports/monkeys-audio/portfile.cmake
index 1375818ed1..d779ba0a3e 100644
--- a/ports/monkeys-audio/portfile.cmake
+++ b/ports/monkeys-audio/portfile.cmake
@@ -16,6 +16,7 @@ vcpkg_extract_source_archive(
     PATCHES
         fix-project-config.patch
         remove-certificate-step.patch
+        fix-C2471.patch
 )
 
 file(REMOVE_RECURSE
diff --git a/ports/monkeys-audio/vcpkg.json b/ports/monkeys-audio/vcpkg.json
index 2f31c6cd1e..7c77fa29a5 100644
--- a/ports/monkeys-audio/vcpkg.json
+++ b/ports/monkeys-audio/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "monkeys-audio",
   "version-string": "9.04",
+  "port-version": 1,
   "description": [
     "Monkey's Audio is an excellent audio compression tool which has multiple advantages over traditional methods.",
     "Audio files compressed with it end with .ape extension."
diff --git a/versions/baseline.json b/versions/baseline.json
index 0b5388613a..7f5966a11e 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -5118,7 +5118,7 @@
     },
     "monkeys-audio": {
       "baseline": "9.04",
-      "port-version": 0
+      "port-version": 1
     },
     "moos-core": {
       "baseline": "10.4.0",
diff --git a/versions/m-/monkeys-audio.json b/versions/m-/monkeys-audio.json
index e0f86ce77d..854d19c9b1 100644
--- a/versions/m-/monkeys-audio.json
+++ b/versions/m-/monkeys-audio.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "65d1eadb4f2e5961fec2975b2450513b6c7b6d6a",
+      "version-string": "9.04",
+      "port-version": 1
+    },
     {
       "git-tree": "ae5b8fee2db96b691e609427278a6974180e68d4",
       "version-string": "9.04",