diff --git a/glide3x/cvg/glide3/src/Makefile.wat b/glide3x/cvg/glide3/src/Makefile.wat
index da2b22c..5149130 100644
--- a/glide3x/cvg/glide3/src/Makefile.wat
+++ b/glide3x/cvg/glide3/src/Makefile.wat
@@ -108,7 +108,7 @@ ASFLAGS = -O6 -fobj -D__WATCOMD__ --prefix _
 ASFLAGS += $(CDEFS)
 
 # compiler
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I. -I../../incsrc -I../../init
 CFLAGS += -I$(FX_GLIDE_SW)/fxmisc -I$(FX_GLIDE_SW)/newpci/pcilib -I$(FX_GLIDE_SW)/fxmemmap
 CFLAGS += -I$(FX_GLIDE_SW)/texus2/lib
diff --git a/glide3x/cvg/glide3/tests/Makefile.wat b/glide3x/cvg/glide3/tests/Makefile.wat
index 5a491b5..3f4ed50 100644
--- a/glide3x/cvg/glide3/tests/Makefile.wat
+++ b/glide3x/cvg/glide3/tests/Makefile.wat
@@ -27,7 +27,7 @@ FX_GLIDE_HW = cvg
 TOP = ../../..
 
 CC = wcl386
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I$(TOP)/$(FX_GLIDE_HW)/glide3/src -I$(TOP)/$(FX_GLIDE_HW)/incsrc
 CFLAGS += -I$(TOP)/swlibs/fxmisc
 CFLAGS += -D__DOS__ -DCVG
diff --git a/glide3x/h3/glide3/src/Makefile.wat b/glide3x/h3/glide3/src/Makefile.wat
index b96095e..d3f2668 100644
--- a/glide3x/h3/glide3/src/Makefile.wat
+++ b/glide3x/h3/glide3/src/Makefile.wat
@@ -102,7 +102,7 @@ ASFLAGS = -O6 -fobj -D__WATCOMD__ --prefix _
 ASFLAGS += $(CDEFS)
 
 # compiler
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I. -I../../incsrc -I../../minihwc -I../../cinit
 CFLAGS += -I$(FX_GLIDE_SW)/fxmisc -I$(FX_GLIDE_SW)/newpci/pcilib -I$(FX_GLIDE_SW)/fxmemmap
 CFLAGS += -I$(FX_GLIDE_SW)/texus2/lib
diff --git a/glide3x/h3/glide3/tests/Makefile.wat b/glide3x/h3/glide3/tests/Makefile.wat
index bcf7970..d3f4114 100644
--- a/glide3x/h3/glide3/tests/Makefile.wat
+++ b/glide3x/h3/glide3/tests/Makefile.wat
@@ -27,7 +27,7 @@ FX_GLIDE_HW = h3
 TOP = ../../..
 
 CC = wcl386
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I$(TOP)/$(FX_GLIDE_HW)/glide3/src -I$(TOP)/$(FX_GLIDE_HW)/incsrc
 CFLAGS += -I$(TOP)/swlibs/fxmisc
 CFLAGS += -D__DOS__ -DH3
diff --git a/glide3x/h5/glide3/src/Makefile.wat b/glide3x/h5/glide3/src/Makefile.wat
index 1014a81..7c34aea 100644
--- a/glide3x/h5/glide3/src/Makefile.wat
+++ b/glide3x/h5/glide3/src/Makefile.wat
@@ -109,7 +109,7 @@ ASFLAGS = -O6 -fobj -D__WATCOMD__ --prefix _
 ASFLAGS += $(CDEFS)
 
 # compiler
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I. -I../../incsrc -I../../minihwc -I../../cinit
 CFLAGS += -I$(FX_GLIDE_SW)/fxmisc -I$(FX_GLIDE_SW)/newpci/pcilib -I$(FX_GLIDE_SW)/fxmemmap
 CFLAGS += -I$(FX_GLIDE_SW)/texus2/lib
diff --git a/glide3x/h5/glide3/tests/Makefile.wat b/glide3x/h5/glide3/tests/Makefile.wat
index d706336..1f925c9 100644
--- a/glide3x/h5/glide3/tests/Makefile.wat
+++ b/glide3x/h5/glide3/tests/Makefile.wat
@@ -27,7 +27,7 @@ FX_GLIDE_HW = h5
 TOP = ../../..
 
 CC = wcl386
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I$(TOP)/$(FX_GLIDE_HW)/glide3/src -I$(TOP)/$(FX_GLIDE_HW)/incsrc
 CFLAGS += -I$(TOP)/swlibs/fxmisc
 CFLAGS += -D__DOS__ -DH3
diff --git a/glide3x/sst1/glide3/src/Makefile.wat b/glide3x/sst1/glide3/src/Makefile.wat
index 51f1b0c..d12f165 100644
--- a/glide3x/sst1/glide3/src/Makefile.wat
+++ b/glide3x/sst1/glide3/src/Makefile.wat
@@ -108,7 +108,7 @@ ASFLAGS = -O6 -fobj -D__WATCOMD__ --prefix _
 ASFLAGS += $(CDEFS)
 
 # compiler
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I. -I../../incsrc -I../../init -I../../init/initvg -I../../init/init96
 CFLAGS += -I$(FX_GLIDE_SW)/fxmisc -I$(FX_GLIDE_SW)/newpci/pcilib -I$(FX_GLIDE_SW)/fxmemmap
 CFLAGS += -I$(FX_GLIDE_SW)/texus2/lib
diff --git a/glide3x/sst1/glide3/tests/Makefile.wat b/glide3x/sst1/glide3/tests/Makefile.wat
index 11d73f7..82d6397 100644
--- a/glide3x/sst1/glide3/tests/Makefile.wat
+++ b/glide3x/sst1/glide3/tests/Makefile.wat
@@ -38,7 +38,7 @@ override FX_HW_BASE = sst1
 TOP = ../../..
 
 CC = wcl386
-CFLAGS = -wx
+CFLAGS = -bt=dos -wx
 CFLAGS += -I$(TOP)/$(FX_HW_BASE)/glide3/src -I$(TOP)/$(FX_HW_BASE)/incsrc -I$(TOP)/$(FX_HW_BASE)/init
 CFLAGS += -I$(TOP)/swlibs/fxmisc
 CFLAGS += -D__DOS__ $(HWDEF)