diff --git a/configure.ac b/configure.ac
index 2d9b3b0..e23da54 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2374,7 +2374,7 @@ if test x$cross_compiling = xno; then
            esac])
   AC_SUBST(RED5_HOST)
 fi
-AM_CONDITIONAL(ENABLE_RED5_TESTING, [ test x"$RED5_HOST" != x ])
+AM_CONDITIONAL(ENABLE_RED5_TESTING, [ test x"$RED5_HOST" != x -a -n "$CURL_RTMP" ])
 
 if test x$cross_compiling = xno; then
   AC_ARG_ENABLE([rtmpy_testing],
@@ -3702,6 +3702,9 @@ if test x"$CURL_LIBS" != x; then
     echo "        CURL flags are: default include path"
   fi
     echo "        CURL libs are: $CURL_LIBS"
+  if test ! -n "$CURL_RTMP"; then
+    PKG_WAR([CURL library present but built without RTMP support. Gnash will not be able to play RTMP streaming. Red5 tests disabled.])
+  fi
 else
   PKG_REC([If you install the CURL library, Gnash will be able to display remote content (streaming from URLs) using CURL.])
   PKG_SUGGEST([Install libcurl from http://curl.haxx.se/libcurl])
diff --git a/macros/curl.m4 b/macros/curl.m4
index b0ad815..be3a604 100644
--- a/macros/curl.m4
+++ b/macros/curl.m4
@@ -136,6 +136,12 @@ AC_DEFUN([GNASH_PATH_CURL],
     AC_DEFINE(USE_CURL, [1], [Define this if you want to enable curl usage])
   fi
 
+  if test x"${curlconfig}" != "x"; then
+    if test x"`${curlconfig} --protocols|grep RTMP`" != x; then
+      AC_DEFINE(CURL_RTMP, [1], [Define this if curl supports RTMP protocol])
+    fi
+  fi
+
   AC_SUBST(CURL_CFLAGS)
   AC_SUBST(CURL_LIBS)
 ])