diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index cc89bfe..916ce77 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -21,6 +21,8 @@
 TESTS=0
 FAILS=0
 
+CONFIG_H='../include/polarssl/config.h'
+
 MEMCHECK=0
 FILTER='.*'
 EXCLUDE='SSLv2' # disabled by default, needs OpenSSL compiled with SSLv2
@@ -878,6 +880,8 @@
 
 # Tests for ALPN extension
 
+if grep '^#define POLARSSL_SSL_ALPN' $CONFIG_H >/dev/null; then
+
 run_test    "ALPN #0 (none)" \
             "$P_SRV debug_level=4" \
             "$P_CLI debug_level=4" \
@@ -962,6 +966,8 @@
             -C "Application Layer Protocol is 1234" \
             -S "Application Layer Protocol is 1234"
 
+fi
+
 # Final report
 
 echo "------------------------------------------------------------------------"