diff --git a/auto/lib/zlib/makefile.bcc b/auto/lib/zlib/makefile.bcc
index 56f835688..97a30ea39 100644
--- a/auto/lib/zlib/makefile.bcc
+++ b/auto/lib/zlib/makefile.bcc
@@ -8,8 +8,10 @@ CFLAGS = -q -O2 -tWM -w-8004 -w-8012 $(CPU_OPT)
 zlib.lib:
 	cd $(ZLIB)
 
-	bcc32 -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c \
-		compress.c
+	bcc32 -c $(CFLAGS) adler32.c crc32.c deflate.c \
+		trees.c zutil.c compress.c \
+		inflate.c inffast.c inftrees.c
 
 	tlib zlib.lib +adler32.obj +crc32.obj +deflate.obj \
-		+trees.obj +zutil.obj +compress.obj
+		+trees.obj +zutil.obj +compress.obj \
+		+inflate.obj +inffast.obj +inftrees.obj
diff --git a/auto/lib/zlib/makefile.msvc b/auto/lib/zlib/makefile.msvc
index 2c7c1ae10..6fbd6918c 100644
--- a/auto/lib/zlib/makefile.msvc
+++ b/auto/lib/zlib/makefile.msvc
@@ -8,7 +8,10 @@ CFLAGS = -nologo -O2 -Ob1 -Oi -Gs $(LIBC) $(CPU_OPT)
 zlib.lib:
 	cd $(ZLIB)
 
-	cl -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c compress.c
+	cl -c $(CFLAGS) adler32.c crc32.c deflate.c \
+		trees.c zutil.c compress.c \
+		inflate.c inffast.c inftrees.c
 
 	link -lib -out:zlib.lib adler32.obj crc32.obj deflate.obj \
-		trees.obj zutil.obj compress.obj
+		trees.obj zutil.obj compress.obj \
+		inflate.obj inffast.obj inftrees.obj
diff --git a/auto/lib/zlib/makefile.owc b/auto/lib/zlib/makefile.owc
index f75e66d4f..9e123be83 100644
--- a/auto/lib/zlib/makefile.owc
+++ b/auto/lib/zlib/makefile.owc
@@ -9,6 +9,6 @@ zlib.lib:
 	cd $(ZLIB)
 
 	wcl386 -c $(CFLAGS) adler32.c crc32.c deflate.c trees.c zutil.c &
-		compress.c
+		compress.c inflate.c inffast.c inftrees.c
 	wlib -n zlib.lib adler32.obj crc32.obj deflate.obj trees.obj &
-		zutil.obj compress.obj
+		zutil.obj compress.obj inflate.obj inffast.obj inftrees.obj