--- a/configure.rb
+++ b/configure.rb
@@ -480,7 +480,7 @@
   case RUBY_PLATFORM
   when /-sunos4/
     $LIBERUBY_ALIASES = "liberuby.so.$(MAJOR).$(MINOR) liberuby.so"
-  when /-linux/
+  when /-(linux|kfreebsd)/
     $DLDFLAGS = '-Wl,-soname,liberuby.so.$(MAJOR).$(MINOR)'
     $LIBERUBY_ALIASES = "liberuby.so.$(MAJOR).$(MINOR) liberuby.so"
   when /-(freebsd|netbsd)/
--- a/configure.rb.in
+++ b/configure.rb.in
@@ -56,7 +56,7 @@
   case PLATFORM
   when /-sunos4/
     $LIBERUBY_ALIASES = "liberuby.so.$(MAJOR).$(MINOR) liberuby.so"
-  when /-linux/
+  when /-(linux|kfreebsd)/
     $DLDFLAGS = '-Wl,-soname,liberuby.so.$(MAJOR).$(MINOR)'
     $LIBERUBY_ALIASES = "liberuby.so.$(MAJOR).$(MINOR) liberuby.so"
   when /-(freebsd|netbsd)/