diff --git a/scripts/openssl.test b/scripts/openssl.test
index 47d1cfc80..348b39d1a 100755
--- a/scripts/openssl.test
+++ b/scripts/openssl.test
@@ -32,9 +32,19 @@ echo "WOLFSSL_OPENSSL_TEST set, running test..."
 
 # need a unique port since may run the same time as testsuite
 generate_port() {
-    port=$(($(od -An -N2 /dev/random) % (65535-49512) + 49512))
-}
+    #-------------------------------------------------------------------------#
+    # Generate a random port number
+    #-------------------------------------------------------------------------#
 
+    if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+        port=$(($(od -An -N2 /dev/urandom) % (65535-49512) + 49512))
+    elif [[ "$OSTYPE" == "darwin"* ]]; then
+        port=$(($(od -An -N2 /dev/random) % (65535-49512) + 49512))
+    else
+        echo "Unknown OS TYPE"
+        exit 1
+    fi
+}
 
 no_pid=-1
 servers=""