diff --git a/src/BizHawk.Client.Common/ReflectionCache.cs b/src/BizHawk.Client.Common/ReflectionCache.cs
index 9d15954685..d9c1d21370 100644
--- a/src/BizHawk.Client.Common/ReflectionCache.cs
+++ b/src/BizHawk.Client.Common/ReflectionCache.cs
@@ -7,7 +7,7 @@ namespace BizHawk.Client.Common
 	{
 		private static readonly Lazy<Type[]> _types = new Lazy<Type[]>(() => Asm.GetTypes());
 
-		public static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
+		private static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
 
 		public static Type[] Types => _types.Value;
 	}
diff --git a/src/BizHawk.Client.EmuHawk/ReflectionCache.cs b/src/BizHawk.Client.EmuHawk/ReflectionCache.cs
index c34d5f73a6..5d0da14365 100644
--- a/src/BizHawk.Client.EmuHawk/ReflectionCache.cs
+++ b/src/BizHawk.Client.EmuHawk/ReflectionCache.cs
@@ -11,7 +11,7 @@ namespace BizHawk.Client.EmuHawk
 	{
 		private static readonly Lazy<Type[]> _types = new Lazy<Type[]>(() => Asm.GetTypesWithoutLoadErrors().ToArray());
 
-		public static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
+		private static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
 
 		public static Type[] Types => _types.Value;
 
diff --git a/src/BizHawk.Emulation.Common/ReflectionCache.cs b/src/BizHawk.Emulation.Common/ReflectionCache.cs
index 49f091642e..f10d87347c 100644
--- a/src/BizHawk.Emulation.Common/ReflectionCache.cs
+++ b/src/BizHawk.Emulation.Common/ReflectionCache.cs
@@ -7,7 +7,7 @@ namespace BizHawk.Emulation.Common
 	{
 		private static readonly Lazy<Type[]> _types = new Lazy<Type[]>(() => Asm.GetTypes());
 
-		public static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
+		private static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
 
 		public static Type[] Types => _types.Value;
 	}
diff --git a/src/BizHawk.Emulation.Cores/ReflectionCache.cs b/src/BizHawk.Emulation.Cores/ReflectionCache.cs
index 1528cbec50..669d8aa775 100644
--- a/src/BizHawk.Emulation.Cores/ReflectionCache.cs
+++ b/src/BizHawk.Emulation.Cores/ReflectionCache.cs
@@ -8,7 +8,7 @@ namespace BizHawk.Emulation.Cores
 	{
 		private static readonly Lazy<Type[]> _types = new Lazy<Type[]>(() => Asm.GetTypes());
 
-		public static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
+		private static readonly Assembly Asm = typeof(ReflectionCache).Assembly;
 
 		public static Type[] Types => _types.Value;