diff --git a/toolbox/os.cpp b/toolbox/os.cpp
index 362a5d9..1d7a1f4 100644
--- a/toolbox/os.cpp
+++ b/toolbox/os.cpp
@@ -581,6 +581,35 @@ namespace OS
 		return d0;
 	}
 
+	uint16_t GetFPos(uint16_t trap)
+	{
+		uint32_t d0;
+
+		uint32_t parm = cpuGetAReg(0);
+
+		Log("%04x GetFPos(%08x)\n", trap, parm);
+
+		//uint32_t ioCompletion = memoryReadLong(parm + 12);
+		uint16_t ioRefNum = memoryReadWord(parm + 24);
+
+		int rv = ::lseek(ioRefNum, 0, SEEK_CUR);
+		if (rv < 0)
+		{
+			d0 = errno_to_oserr(errno);
+		}
+		else
+		{
+			memoryWriteLong(0, parm + 36); // ioReqCount
+			memoryWriteLong(0, parm + 40); // ioActCount
+			memoryWriteWord(0, parm + 44); // ioPosMode
+			memoryWriteLong(rv, parm + 46); // ioPosOffset
+			d0 = 0;
+		}
+
+		memoryWriteWord(d0, parm + 16);
+		return d0;
+	}
+
 	uint16_t SetFPos(uint16_t trap)
 	{
 		uint32_t d0;
diff --git a/toolbox/os.h b/toolbox/os.h
index 60add94..3c56350 100644
--- a/toolbox/os.h
+++ b/toolbox/os.h
@@ -46,6 +46,7 @@ namespace OS
 	uint16_t GetEOF(uint16_t trap);
 	uint16_t SetEOF(uint16_t trap);
 
+	uint16_t GetFPos(uint16_t trap);
 	uint16_t SetFPos(uint16_t trap);
 
 	uint16_t GetVol(uint16_t trap);
diff --git a/toolbox/toolbox.cpp b/toolbox/toolbox.cpp
index faf5281..7fd6293 100644
--- a/toolbox/toolbox.cpp
+++ b/toolbox/toolbox.cpp
@@ -80,6 +80,10 @@ namespace ToolBox {
 				d0 = OS::HGetVol(trap);
 				break;
 
+			case 0xa018:
+				d0 = OS::GetFPos(trap);
+				break;
+
 			case 0xa044:
 				d0 = OS::SetFPos(trap);
 				break;