diff --git a/doc/plustek/Makefile.kernel26 b/doc/plustek/Makefile.kernel26
index ae7c4713f..0a8f57f9b 100644
--- a/doc/plustek/Makefile.kernel26
+++ b/doc/plustek/Makefile.kernel26
@@ -8,6 +8,8 @@
 ifeq ($(LINUXVERSION),)
  LINUXVERSION = $(shell uname -r)
 endif
+LINUXRELEASE = $(shell uname -r | cut -d'.' -f3)
+
 VERSION0 = $(shell cat $(SUBDIRS)/../VERSION0)
 VERSION1 = $(shell cat $(SUBDIRS)/../VERSION1)
 BUILD    = $(shell cat $(SUBDIRS)/../BUILD)
@@ -21,6 +23,10 @@ ifeq ($(DEBUG),y)
 	EXTRA_CFLAGS += -DDEBUG
 endif
 
+ifeq ($(shell test `uname -r | cut -d'.' -f3` -lt 6 && echo 1),1)
+	EXTRA_CFLAGS += -mhard-float
+endif
+
 #
 # the module name
 #
@@ -48,7 +54,7 @@ KDIR := /lib/modules/$(shell uname -r)/build
 PWD  := $(shell pwd)
 
 default:
-	$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
+	$(MAKE) -C $(KDIR) M=$(PWD) modules
 endif
 
 #