diff --git a/toolbox/os.cpp b/toolbox/os.cpp
index db40ec8..d07aef1 100644
--- a/toolbox/os.cpp
+++ b/toolbox/os.cpp
@@ -605,6 +605,17 @@ namespace OS
 		return d0;
 	}
 
+	uint16_t FlushVol(uint16_t trap)
+	{
+		uint32_t parm = cpuGetAReg(0);
+
+		Log("%04x FlushVol(%08x)\n", trap, parm);		
+
+		// ioResult
+		memoryWriteWord(0, parm + 16);
+
+		return 0;
+	}
 
 	// return the name of the default volume.
 	// this does not translate well.
diff --git a/toolbox/os.h b/toolbox/os.h
index 297ea9f..c0ff239 100644
--- a/toolbox/os.h
+++ b/toolbox/os.h
@@ -38,6 +38,7 @@ namespace OS
 	uint16_t Close(uint16_t trap);
 	uint16_t Create(uint16_t trap);
 	uint16_t Delete(uint16_t trap);
+	uint16_t FlushVol(uint16_t trap);
 	
 	uint16_t GetFileInfo(uint16_t trap);
 	uint16_t SetFileInfo(uint16_t trap);
diff --git a/toolbox/toolbox.cpp b/toolbox/toolbox.cpp
index ea8acb1..e9d6db1 100644
--- a/toolbox/toolbox.cpp
+++ b/toolbox/toolbox.cpp
@@ -68,6 +68,9 @@ namespace ToolBox {
 			case 0xa012:
 				d0 = OS::SetEOF(trap);
 				break;
+			case 0xa013:
+				d0 = OS::FlushVol(trap);
+				break;
 
 			case 0xa014:
 				d0 = OS::GetVol(trap);
@@ -289,7 +292,7 @@ namespace ToolBox {
 			case 0xa9ba:
 				d0 = Utility::GetString(trap);
 				break;
-				
+
 			default:
 				fprintf(stderr, "Unsupported tool trap: %04x\n", trap);
 				fprintf(stderr, "pc: %08x\n", cpuGetPC());