diff --git a/Makefile b/Makefile
index 1cc719c7..cc39ee93 100644
--- a/Makefile
+++ b/Makefile
@@ -70,11 +70,14 @@ ETCDIR := /etc
 LIBDIR := $(PREFIX)/lib
 
 # You should not need to change this. It is the directory into which the
-# executable program files will be installed.
+# executable program files will be installed. BINDIR for programs that are
+# also useful for normal users, SBINDIR for programs that can only be run
+# by the superuser.
 # Note that not all programs in this package are really installed;
 # some are just examples. You can always install them by hand, of
 # course.
 BINDIR := $(PREFIX)/bin
+SBINDIR := $(PREFIX)/sbin
 
 # You should not need to change this. It is the basic directory into which
 # include files will be installed. The actual directory will be 
diff --git a/prog/detect/Module.mk b/prog/detect/Module.mk
index 7d9a4e05..29c6dbd3 100644
--- a/prog/detect/Module.mk
+++ b/prog/detect/Module.mk
@@ -24,6 +24,7 @@ MODULE_DIR := prog/detect
 # defined value verbatim into the command-list of rules...
 PROGDETECTTARGETS := $(MODULE_DIR)/i2cdetect
 PROGDETECTSOURCES := $(MODULE_DIR)/i2cdetect.c
+PROGDETECTSBININSTALL := $(MODULE_DIR)/sensors-detect
 
 # Include all dependency files. We use '.rd' to indicate this will create
 # executables.
@@ -32,6 +33,11 @@ INCLUDEFILES += $(PROGDETECTSOURCES:.c=.rd)
 all-prog-detect: $(PROGDETECTTARGETS)
 all :: all-prog-detect
 
+install-prog-detect: all-prog-detect
+	mkdir -p $(SBINDIR)
+	$(INSTALL) -o root -g root -m 755 $(PROGDETECTSBININSTALL) $(SBINDIR)
+install :: install-prog-detect
+
 clean-prog-detect:
 	$(RM) $(PROGDETECTSOURCES:.c=.rd) $(PROGDETECTSOURCES:.c=.ro) \
 	      $(PROGDETECTTARGETS)
diff --git a/prog/detect/sensors-detect b/prog/detect/sensors-detect
index 7f0027b8..0cf46f77 100755
--- a/prog/detect/sensors-detect
+++ b/prog/detect/sensors-detect
@@ -158,9 +158,6 @@ use subs qw(lm78_detect lm78_isa_detect lm78_alias_detect lm75_detect
        driver => "w83781d",
        i2c_addrs => [0x00..0x7f], 
        i2c_detect => sub { w83781d_detect 1, @_},
-       isa_addrs => [0x290],
-       isa_detect => sub { w83781d_isa_detect 1, @_ },
-       alias_detect => sub { w83781d_alias_detect 1, @_ },
      } ,
      {
        name => "Winbond W83783S",
@@ -1149,8 +1146,8 @@ sub w83781d_detect
   return unless (($reg1 & 0x80) == 0x00 and $reg2 == 0xa3) or 
                 (($reg1 & 0x80) == 0x80 and $reg2 == 0x5c);
   return unless ($reg1 & 0x07) == 0x00;
-  $reg1 = i2c_smbus_read_byte_data($file,0x58);
-  return if $chip == 0 and  ($reg1 & 0xfe) != 0x10;
+  $reg1 = i2c_smbus_read_byte_data($file,0x58) &0xfe;
+  return if $chip == 0 and  $reg1 != 0x10;
   return if $chip == 1 and  $reg1 != 0x30;
   return if $chip == 2 and  $reg1 != 0x40;
   $reg1 = i2c_smbus_read_byte_data($file,0x4a);