diff --git a/src/Makefile.in b/src/Makefile.in
index f03f7fae8..c52744f51 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -26,7 +26,7 @@ else
   INIT_USER=$(INSTALLUSER)
 endif
 
-EFLAGS += -pa .
+EFLAGS += @ERLANG_SSLVER@ -pa .
 
 # make debug=true to compile Erlang module with debug informations.
 ifdef debug
diff --git a/src/acinclude.m4 b/src/acinclude.m4
index e91fee816..8c18b3e42 100644
--- a/src/acinclude.m4
+++ b/src/acinclude.m4
@@ -98,9 +98,17 @@ start() ->
     end,
     EXMPPDirS = EXMPPDir ++ "\n",
     RootDirS = code:root_dir() ++ "\n",
-    file:write_file("conftest.out", list_to_binary(EIDirS ++ EILibS ++ EXMPPDirS ++ RootDirS)),
+    file:write_file("conftest.out", list_to_binary(EIDirS ++ EILibS ++ ssldef() ++ EXMPPDirS ++ RootDirS)),
     halt().
 
+ssldef() -> 
+   OTP = (catch erlang:system_info(otp_release)),
+   if
+	OTP >= "R14" -> "-DSSL40\n";
+	OTP >= "R12" -> "-DSSL39\n";
+        true -> "\n"
+   end.
+
 %% return physical architecture based on OS/Processor
 archname() ->
     ArchStr = erlang:system_info(system_architecture),
@@ -149,7 +157,9 @@ _EOF
    # Second line
    ERLANG_EI_LIB=`cat conftest.out | head -n 2 | tail -n 1`
    # Third line
-   ERLANG_EXMPP=`cat conftest.out | head -n 3 | tail -n 1`
+   ERLANG_SSLVER=`cat conftest.out | head -n 3 | tail -n 1`
+   # Fourth line
+   ERLANG_EXMPP=`cat conftest.out | head -n 4 | tail -n 1`
    # End line
    ERLANG_DIR=`cat conftest.out | tail -n 1`
 
@@ -158,6 +168,7 @@ _EOF
 
    AC_SUBST(ERLANG_CFLAGS)
    AC_SUBST(ERLANG_LIBS)
+   AC_SUBST(ERLANG_SSLVER)
    AC_SUBST(ERLANG_EXMPP)
    AC_SUBST(ERLC)
    AC_SUBST(ERL)