diff --git a/setter/src/dos/attr.c b/setter/src/dos/attr.c
index 78919f9..d4c553c 100644
--- a/setter/src/dos/attr.c
+++ b/setter/src/dos/attr.c
@@ -60,7 +60,7 @@ void FileAttributes(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("ATTRS");
+    rc = __dos_mkdir("ATTRS");
 
     if(rc)
     {
diff --git a/setter/src/dos/deleted.c b/setter/src/dos/deleted.c
index 3d7fd2c..32b2e5c 100644
--- a/setter/src/dos/deleted.c
+++ b/setter/src/dos/deleted.c
@@ -67,7 +67,7 @@ void DeleteFiles(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("DELETED");
+    rc = __dos_mkdir("DELETED");
 
     if(rc)
     {
diff --git a/setter/src/dos/dirdepth.c b/setter/src/dos/dirdepth.c
index aa4d79c..1282af5 100644
--- a/setter/src/dos/dirdepth.c
+++ b/setter/src/dos/dirdepth.c
@@ -62,7 +62,7 @@ void DirectoryDepth(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("DEPTH");
+    rc = __dos_mkdir("DEPTH");
 
     if(rc)
     {
@@ -78,7 +78,7 @@ void DirectoryDepth(const char* path)
     {
         memset(&filename, 0, 9);
         sprintf(&filename, "%08d", pos);
-        rc = mkdir(filename);
+        rc = __dos_mkdir(filename);
 
         if(!rc) rc = chdir(filename);
 
diff --git a/setter/src/dos/dos.h b/setter/src/dos/dos.h
index 7c46190..0e07a71 100644
--- a/setter/src/dos/dos.h
+++ b/setter/src/dos/dos.h
@@ -32,6 +32,14 @@ Copyright (C) 2011-2021 Natalia Portillo
 #ifndef AARU_FSTESTER_SETTER_DOS_H
 #define AARU_FSTESTER_SETTER_DOS_H
 
+#if defined(__WATCOM__)
+#include <direct.h>
+#define __dos_mkdir(a) mkdir(a)
+#elif defined(__DJGPP__)
+#include <sys/stat.h>
+#define __dos_mkdir(path) mkdir(path, 0)
+#endif
+
 #pragma pack(__push, 1)
 
 typedef struct _Fat32FreeSpace
diff --git a/setter/src/dos/filename.c b/setter/src/dos/filename.c
index c8d133d..5f9867c 100644
--- a/setter/src/dos/filename.c
+++ b/setter/src/dos/filename.c
@@ -63,7 +63,7 @@ void Filenames(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("FILENAME");
+    rc = __dos_mkdir("FILENAME");
 
     if(rc)
     {
diff --git a/setter/src/dos/files.c b/setter/src/dos/files.c
index 14b37ab..9e18a7d 100644
--- a/setter/src/dos/files.c
+++ b/setter/src/dos/files.c
@@ -63,7 +63,7 @@ void MillionFiles(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("MILLION");
+    rc = __dos_mkdir("MILLION");
 
     if(rc)
     {
diff --git a/setter/src/dos/frag.c b/setter/src/dos/frag.c
index 802e9d3..28e4a32 100644
--- a/setter/src/dos/frag.c
+++ b/setter/src/dos/frag.c
@@ -67,7 +67,7 @@ void Fragmentation(const char* path, size_t clusterSize)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("FRAGS");
+    rc = __dos_mkdir("FRAGS");
 
     if(rc)
     {
diff --git a/setter/src/dos/time.c b/setter/src/dos/time.c
index 33fe4d3..c8db30c 100644
--- a/setter/src/dos/time.c
+++ b/setter/src/dos/time.c
@@ -70,7 +70,7 @@ void Timestamps(const char* path)
     _dos_setdrive(driveNo, &total);
     chdir("\\");
 
-    rc = mkdir("TIMES");
+    rc = __dos_mkdir("TIMES");
 
     if(rc)
     {