diff --git a/src/BizHawk.Client.Common/Api/Classes/MemoryApi.cs b/src/BizHawk.Client.Common/Api/Classes/MemoryApi.cs
index c77b841cbb..260e94bc92 100644
--- a/src/BizHawk.Client.Common/Api/Classes/MemoryApi.cs
+++ b/src/BizHawk.Client.Common/Api/Classes/MemoryApi.cs
@@ -290,7 +290,7 @@ namespace BizHawk.Client.Common
 			return BitConverter.ToSingle(BitConverter.GetBytes(d.PeekUint(addr, _isBigEndian)), 0);
 		}
 
-		public void WriteFloat(long addr, double value, string domain = null)
+		public void WriteFloat(long addr, float value, string domain = null)
 		{
 			var d = NamedDomainOrCurrent(domain);
 			if (!d.Writable)
@@ -303,7 +303,7 @@ namespace BizHawk.Client.Common
 				LogCallback($"Warning: Attempted write {addr} outside memory size of {d.Size}");
 				return;
 			}
-			d.PokeUint(addr, BitConverter.ToUInt32(BitConverter.GetBytes((float) value), 0), _isBigEndian);
+			d.PokeUint(addr, BitConverter.ToUInt32(BitConverter.GetBytes(value), 0), _isBigEndian);
 		}
 
 		public int ReadS8(long addr, string domain = null) => (sbyte) ReadUnsigned(addr, 1, domain);
diff --git a/src/BizHawk.Client.Common/Api/Interfaces/IMemoryApi.cs b/src/BizHawk.Client.Common/Api/Interfaces/IMemoryApi.cs
index 52134d3cf4..ae644937a0 100644
--- a/src/BizHawk.Client.Common/Api/Interfaces/IMemoryApi.cs
+++ b/src/BizHawk.Client.Common/Api/Interfaces/IMemoryApi.cs
@@ -31,7 +31,7 @@ namespace BizHawk.Client.Common
 
 		void WriteByte(long addr, uint value, string domain = null);
 		void WriteByteRange(long addr, IReadOnlyList<byte> memoryblock, string domain = null);
-		void WriteFloat(long addr, double value, string domain = null);
+		void WriteFloat(long addr, float value, string domain = null);
 
 		void WriteS8(long addr, int value, string domain = null);
 		void WriteS16(long addr, int value, string domain = null);
diff --git a/src/BizHawk.Client.Common/lua/CommonLibs/MemoryLuaLibrary.cs b/src/BizHawk.Client.Common/lua/CommonLibs/MemoryLuaLibrary.cs
index a7523c196f..c5f71f63b5 100644
--- a/src/BizHawk.Client.Common/lua/CommonLibs/MemoryLuaLibrary.cs
+++ b/src/BizHawk.Client.Common/lua/CommonLibs/MemoryLuaLibrary.cs
@@ -124,7 +124,7 @@ namespace BizHawk.Client.Common
 
 		[LuaMethodExample("memory.writefloat( 0x100, 10.0, false, mainmemory.getname( ) );")]
 		[LuaMethod("writefloat", "Writes the given 32-bit float value to the given address and endian")]
-		public void WriteFloat(long addr, double value, bool bigendian, string domain = null)
+		public void WriteFloat(long addr, float value, bool bigendian, string domain = null)
 		{
 			APIs.Memory.SetBigEndian(bigendian);
 			APIs.Memory.WriteFloat(addr, value, domain);
diff --git a/src/BizHawk.Client.Common/lua/LuaHelperLibs/MainMemoryLuaLibrary.cs b/src/BizHawk.Client.Common/lua/LuaHelperLibs/MainMemoryLuaLibrary.cs
index c1866470f2..09521cad44 100644
--- a/src/BizHawk.Client.Common/lua/LuaHelperLibs/MainMemoryLuaLibrary.cs
+++ b/src/BizHawk.Client.Common/lua/LuaHelperLibs/MainMemoryLuaLibrary.cs
@@ -121,7 +121,7 @@ namespace BizHawk.Client.Common
 
 		[LuaMethodExample("mainmemory.writefloat( 0x100, 10.0, false );")]
 		[LuaMethod("writefloat", "Writes the given 32-bit float value to the given address and endian")]
-		public void WriteFloat(long addr, double value, bool bigendian)
+		public void WriteFloat(long addr, float value, bool bigendian)
 		{
 			APIs.Memory.SetBigEndian(bigendian);
 			APIs.Memory.WriteFloat(addr, value, MainMemName);