diff --git a/lib/Module.mk b/lib/Module.mk
index f96ec077..30da5dd9 100644
--- a/lib/Module.mk
+++ b/lib/Module.mk
@@ -28,8 +28,12 @@ LIBMAN5DIR := $(MANDIR)/man5
 LIBMAN5FILES := $(MODULE_DIR)/sensors.conf.5
 
 # The main and minor version of the library
+# The library soname (major number) must be changed if and only if the interface is
+# changed in a backward incompatible way.  The interface is defined by
+# the public header files - in this case they are error.h, sensors.h,
+# chips.h.
 LIBMAINVER := 3
-LIBMINORVER := 0.0
+LIBMINORVER := 0.1
 LIBVER := $(LIBMAINVER).$(LIBMINORVER)
 
 # The static lib name, the shared lib name, and the internal ('so') name of