diff --git a/posix.mak b/posix.mak
index befd52c9b4..ec31bb0d5e 100644
--- a/posix.mak
+++ b/posix.mak
@@ -53,7 +53,7 @@ ifeq (solaris,$(OS))
 endif
 
 # Set DFLAGS
-UDFLAGS:=-conf= -Isrc -Iimport -w -dip25 $(MODEL_FLAG) $(OPTIONAL_PIC) $(OPTIONAL_COVERAGE)
+UDFLAGS:=-conf= -Isrc -Iimport -w -dip1000 $(MODEL_FLAG) $(OPTIONAL_PIC) $(OPTIONAL_COVERAGE)
 ifeq ($(BUILD),debug)
 	UDFLAGS += -g -debug
 	DFLAGS:=$(UDFLAGS)
diff --git a/win32.mak b/win32.mak
index f4ee566ed2..0be6b86a86 100644
--- a/win32.mak
+++ b/win32.mak
@@ -9,8 +9,8 @@ CC=dmc
 DOCDIR=doc
 IMPDIR=import
 
-DFLAGS=-m$(MODEL) -conf= -O -release -dip25 -inline -w -Isrc -Iimport
-UDFLAGS=-m$(MODEL) -conf= -O -release -dip25 -w -Isrc -Iimport
+DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -inline -w -Isrc -Iimport
+UDFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -w -Isrc -Iimport
 DDOCFLAGS=-conf= -c -w -o- -Isrc -Iimport -version=CoreDdoc
 
 CFLAGS=
diff --git a/win64.mak b/win64.mak
index fea4d5d475..5252deb178 100644
--- a/win64.mak
+++ b/win64.mak
@@ -17,8 +17,8 @@ IMPDIR=import
 
 MAKE=make
 
-DFLAGS=-m$(MODEL) -conf= -O -release -dip25 -inline -w -Isrc -Iimport
-UDFLAGS=-m$(MODEL) -conf= -O -release -dip25 -w -Isrc -Iimport
+DFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -inline -w -Isrc -Iimport
+UDFLAGS=-m$(MODEL) -conf= -O -release -dip1000 -w -Isrc -Iimport
 DDOCFLAGS=-conf= -c -w -o- -Isrc -Iimport -version=CoreDdoc
 
 #CFLAGS=/O2 /I"$(VCDIR)"\INCLUDE /I"$(SDKDIR)"\Include