diff --git a/include/dos_inc.h b/include/dos_inc.h
index 3944d7e1..26a1c047 100644
--- a/include/dos_inc.h
+++ b/include/dos_inc.h
@@ -147,7 +147,7 @@ bool DOS_FCBClose(Bit16u seg,Bit16u offset);
 bool DOS_FCBFindFirst(Bit16u seg,Bit16u offset);
 bool DOS_FCBFindNext(Bit16u seg,Bit16u offset);
 Bit8u DOS_FCBRead(Bit16u seg,Bit16u offset, Bit16u numBlocks);
-bool DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u numBlocks);
+Bit8u DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u numBlocks);
 Bit8u DOS_FCBRandomRead(Bit16u seg,Bit16u offset,Bit16u numRec,bool restore);
 Bit8u DOS_FCBRandomWrite(Bit16u seg,Bit16u offset,Bit16u numRec,bool restore);
 bool DOS_FCBGetFileSize(Bit16u seg,Bit16u offset,Bit16u numRec);
diff --git a/src/dos/dos.cpp b/src/dos/dos.cpp
index acc756ee..0ff1b2bf 100644
--- a/src/dos/dos.cpp
+++ b/src/dos/dos.cpp
@@ -204,8 +204,7 @@ static Bitu DOS_21Handler(void) {
 		LOG_DEBUG("DOS:0x14 FCB-Read used, result:al=%d",reg_al);
 		break;
 	case 0x15:		/* Sequential write to FCB */
-		if (DOS_FCBWrite(SegValue(ds),reg_dx,0)==true) reg_al = 0x00;
-		else reg_al = 0x01;
+		reg_al=DOS_FCBWrite(SegValue(ds),reg_dx,0);
 		LOG_DEBUG("DOS:0x15 FCB-Write used, result:al=%d",reg_al);
 		break;
 	case 0x16:		/* Create or truncate file using FCB */
@@ -228,8 +227,7 @@ static Bitu DOS_21Handler(void) {
 		LOG_DEBUG("DOS:0x21 FCB-Random read used, result:al=%d",reg_al);
 		break;
 	case 0x22:		/* Write random record to FCB */
-		if (DOS_FCBRandomWrite(SegValue(ds),reg_dx,1,true)) reg_al = 0x00;
-		else reg_al = 0x01;
+		reg_al=DOS_FCBRandomWrite(SegValue(ds),reg_dx,1,true);
 		LOG_DEBUG("DOS:0x28 FCB-Random write used, result:al=%d",reg_al);
 		break;
 	case 0x23:		/* Get file size for FCB */
diff --git a/src/dos/dos_files.cpp b/src/dos/dos_files.cpp
index e4166a6d..4af8f71a 100644
--- a/src/dos/dos_files.cpp
+++ b/src/dos/dos_files.cpp
@@ -696,7 +696,7 @@ Bit8u DOS_FCBRead(Bit16u seg,Bit16u offset,Bit16u recno) {
 	return FCB_READ_PARTIAL;
 }
 
-bool DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u recno)
+Bit8u DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u recno)
 {
 	DOS_FCB fcb(seg,offset);
 	Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;