diff --git a/configure.ac b/configure.ac
index 3eeaf82c..d82c289e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -544,10 +544,10 @@ fi
 if test "${enable_sm}" = "yes"; then
 	AC_DEFINE([ENABLE_SM], [1], [Enable secure messaging support])
 
+	DEFAULT_SM_MODULE="${LIB_PRE}smm-local${DYN_LIB_EXT}"
 	case "${host}" in
 		*-mingw*|*-winnt*|*-cygwin*)
-			DEFAULT_SM_MODULE="smm-local.dll"
-			DEFAULT_SM_MODULE_PATH="\#module_path = \"\";"
+			DEFAULT_SM_MODULE_PATH="\# module_path = \"\";"
 		;;
 		*-apple-*)
 			DEFAULT_SM_MODULE="libsmm-local.dylib"
@@ -627,15 +627,23 @@ if test "${enable_pcsc}" = "yes"; then
 fi
 
 AC_SUBST(DYN_LIB_EXT)
+AC_SUBST(LIBDIR)
+AC_SUBST(LIB_PRE)
 case "${host}" in
 	*-mingw*|*-winnt*|*-cygwin*)
 		DYN_LIB_EXT=".dll"
+		LIBDIR=""
+		LIB_PRE=""
 		;;
 	*-apple-*)
 		DYN_LIB_EXT=".dylib"
+		LIBDIR="\$(libdir)/"
+		LIB_PRE="lib"
 		;;
 	*)
 		DYN_LIB_EXT=".so"
+		LIBDIR="\$(libdir)/"
+		LIB_PRE="lib"
 		;;
 esac
 
diff --git a/etc/Makefile.am b/etc/Makefile.am
index 60e0c1be..fcd2286c 100644
--- a/etc/Makefile.am
+++ b/etc/Makefile.am
@@ -17,12 +17,13 @@ opensc.conf: opensc.conf.in force
 .in:
 	@sed \
 		-e 's|@pkgdatadir[@]|$(pkgdatadir)|g' \
-		-e 's|@libdir[@]|$(libdir)|g' \
 		-e 's|@DEBUG_FILE[@]|$(DEBUG_FILE)|g' \
 		-e 's|@DEFAULT_PCSC_PROVIDER[@]|$(DEFAULT_PCSC_PROVIDER)|g' \
 		-e 's|@DEFAULT_SM_MODULE[@]|$(DEFAULT_SM_MODULE)|g' \
 		-e 's|@DEFAULT_SM_MODULE_PATH[@]|$(DEFAULT_SM_MODULE_PATH)|g' \
 		-e 's|@DYN_LIB_EXT[@]|$(DYN_LIB_EXT)|g' \
+		-e 's|@LIBDIR[@]|$(LIBDIR)|g' \
+		-e 's|@LIB_PRE[@]|$(LIB_PRE)|g' \
 		-e 's|@PROFILE_DIR[@]|$(PROFILE_DIR)|g' \
 		-e 's|@PROFILE_DIR_DEFAULT[@]|$(PROFILE_DIR_DEFAULT)|g' \
 		< $< > $@
diff --git a/etc/opensc.conf.in b/etc/opensc.conf.in
index 37d4ee8e..da26f5df 100644
--- a/etc/opensc.conf.in
+++ b/etc/opensc.conf.in
@@ -53,7 +53,7 @@ app default {
 
 	# CT-API module configuration.
 	reader_driver ctapi {
-		# module @libdir@/libtowitoko@DYN_LIB_EXT@ {
+		# module @LIBDIR@@LIB_PRE@towitoko@DYN_LIB_EXT@ {
 			# CT-API ports:
 			# 0..3		COM1..4
 			# 4		Printer
@@ -134,7 +134,7 @@ app default {
 	#
 	# card_driver customcos {
 		# The location of the driver library
-		# module = @libdir@/card_customcos@DYN_LIB_EXT@;
+		# module = @LIBDIR@@LIB_PRE@card_customcos@DYN_LIB_EXT@;
 	# }
 
 	# Force using specific card driver
@@ -504,7 +504,7 @@ app default {
 		#
 		# emulate custom {
 			# The location of the driver library
-			# module = @libdir@/p15emu_custom@DYN_LIB_EXT@;
+			# module = @LIBDIR@@LIB_PRE@p15emu_custom@DYN_LIB_EXT@;
 		# }
 
 		# some additional application parameters: