diff --git a/programs/fs/minizip/Makefile.miniunz b/programs/fs/minizip/Makefile.miniunz
index 027d3e1a71..a80675483c 100755
--- a/programs/fs/minizip/Makefile.miniunz
+++ b/programs/fs/minizip/Makefile.miniunz
@@ -3,7 +3,7 @@ LD = kos32-ld
 
 SDK_DIR = $(abspath ../../../contrib/sdk)
 
-CFLAGS = -c -fno-ident -O2 -fomit-frame-pointer -fno-ident -U__WIN32__ -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -Dunix
+CFLAGS = -c -fno-ident -Os -fomit-frame-pointer -fno-ident -U__WIN32__ -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -Dunix
 LDFLAGS = -static -S -nostdlib -T $(SDK_DIR)/sources/newlib/app.lds --image-base 0
 
 INCLUDES = -I $(SDK_DIR)/sources/newlib/libc/include -I $(SDK_DIR)/sources/zlib
@@ -15,7 +15,7 @@ default: $(OBJECTS)
 	kos32-ld $(LDFLAGS) $(LIBPATH) --subsystem console -o miniunz $(OBJECTS) -lgcc -lc.dll -lz
 	objcopy miniunz -O binary
 
-%.o : %.c Makefile
+%.o : %.c Makefile.miniunz
 	$(CC) $(CFLAGS) $(INCLUDES) -o $@ $<
 
 clean:
diff --git a/programs/fs/minizip/Makefile.minizip b/programs/fs/minizip/Makefile.minizip
index 0628b36ee3..7278fb7c3b 100755
--- a/programs/fs/minizip/Makefile.minizip
+++ b/programs/fs/minizip/Makefile.minizip
@@ -3,7 +3,7 @@ LD = kos32-ld
 
 SDK_DIR = $(abspath ../../../contrib/sdk)
 
-CFLAGS = -c -fno-ident -O2 -fomit-frame-pointer -fno-ident -U__WIN32__ -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -Dunix
+CFLAGS = -c -fno-ident -Os -fomit-frame-pointer -fno-ident -U__WIN32__ -U_Win32 -U_WIN32 -U__MINGW32__ -UWIN32 -Dunix
 LDFLAGS = -static -S -nostdlib -T $(SDK_DIR)/sources/newlib/app.lds --image-base 0
 
 INCLUDES = -I $(SDK_DIR)/sources/newlib/libc/include -I $(SDK_DIR)/sources/zlib
@@ -15,7 +15,7 @@ default: $(OBJECTS)
 	kos32-ld $(LDFLAGS) $(LIBPATH) --subsystem console -o minizip $(OBJECTS) -lgcc -lc.dll -lz
 	objcopy minizip -O binary
 
-%.o : %.c Makefile
+%.o : %.c Makefile.minizip
 	$(CC) $(CFLAGS) $(INCLUDES) -o $@ $<
 
 clean: