Index: tcl.m4
==================================================================
--- tcl.m4
+++ tcl.m4
@@ -1186,11 +1186,11 @@
 	CFLAGS_WARNING=""
     ])
     AC_CHECK_TOOL(AR, ar)
     STLIB_LD='${AR} cr'
     LD_LIBRARY_PATH_VAR="LD_LIBRARY_PATH"
-    AS_IF([test "x$SHLIB_VERSION" = x],[SHLIB_VERSION=""],[SHLIB_VERSION=".$SHLIB_VERSION"])
+    AS_IF([test "x${SHLIB_VERSION}" = x],[SHLIB_VERSION=".1.0"],[SHLIB_VERSION=".${SHLIB_VERSION}"])
     case $system in
 	# TEA specific:
 	windows)
 	    # This is a 2-stage check to make sure we have the 64-bit SDK
 	    # We have to know where the SDK is installed.