diff --git a/configure.ac b/configure.ac
index 846fe99..7ba579b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,6 +46,16 @@ if test "${build}" != "${host}" -a "${PKG_CONFIG_LIBDIR}" = ""; then
   export PKG_CONFIG_LIBDIR=/dev/null
 fi
 
+AC_MSG_CHECKING(for library suffix)
+LT_SUFFIX="`./libtool -n --mode=link gcc -o libTEST.la -version-number 123:666:999 -rpath / | xargs -n 1 | sed -ne 's/.*libTEST\(@<:@^, ()0-9@:>@*\)123\(@<:@^, ()0-9@:>@*\).*/\1'$LT_MAJOR'\2/p' | grep -v '\.$' | head -n 1`"
+if test "$LT_SUFFIX" = ""; then
+  LT_SUFFIX=".so.$LT_MAJOR"
+  AC_MSG_RESULT(unknown, defaulting to $LT_SUFFIX)
+else
+  AC_MSG_RESULT($LT_SUFFIX)
+fi
+AC_SUBST(LT_SUFFIX)
+
 dnl output driver features
 AC_ARG_ENABLE(slang,
   [  --enable-slang          slang graphics support (autodetected)])
diff --git a/csharp/caca-sharp.dll.config.in b/csharp/caca-sharp.dll.config.in
index cc11842..48dcb99 100644
--- a/csharp/caca-sharp.dll.config.in
+++ b/csharp/caca-sharp.dll.config.in
@@ -1,5 +1,3 @@
 <configuration>
-    <dllmap dll="libcaca.dll" target="libcaca.so.@LT_MAJOR@" />
-    <dllmap dll="libcaca.dll" target="libcaca.dylib.@LT_MAJOR@" />
-    <dllmap dll="libcaca.dll" target="libcaca.sl.@LT_MAJOR@" />
+    <dllmap dll="libcaca.dll" target="libcaca@LT_SUFFIX@" />
 </configuration>