diff --git a/configure b/configure
index 719376e2..b2842377 100755
--- a/configure
+++ b/configure
@@ -1449,7 +1449,8 @@ Optional Features:
   --disable-dependency-tracking
                           speeds up one-time build
   --disable-libtool-lock  avoid locking (might break parallel builds)
-  --enable-audio-callback enable callback-based audio I/O
+  --enable-audio-callback=yes|no
+                          toggle callback-based audio I/O [default=yes]
   --disable-dsp           disable signal processing (echo cancellation, noise
                           suppression, and automatic gain control)
 
@@ -1464,8 +1465,10 @@ Optional Packages:
   --with-gnu-ld           assume the C compiler uses GNU ld [default=no]
   --with-sysroot[=DIR]    Search for dependent libraries within DIR (or the
                           compiler's sysroot if not specified).
-  --without-pulse         disable PulseAudio support
-  --without-alsa          disable ALSA support
+  --with-pulse=yes|no     toggle PulseAudio support, ignored if audio
+                          callbacks are enabled [default=yes]
+  --with-alsa=yes|no      toggle ALSA support, ignored if audio callbacks are
+                          enabled [default=yes]
 
 Some influential environment variables:
   CC          C compiler command
@@ -17818,7 +17821,7 @@ else
 
 			{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "libpulse-dev is required during build, but you don't have it installed. Use --without-pulse to disable PulseAudio support.
+as_fn_error $? "libpulse-dev is required during build, but you don't have it installed. Use --with-pulse=no to disable PulseAudio support.
 See \`config.log' for more details" "$LINENO" 5; }
 
 fi
@@ -17878,7 +17881,7 @@ else
 
 			{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
 $as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "libasound-dev is required during build, but you don't have it installed. Use --without-alsa to disable ALSA support.
+as_fn_error $? "libasound-dev is required during build, but you don't have it installed. Use --with-alsa=no to disable ALSA support.
 See \`config.log' for more details" "$LINENO" 5; }
 
 fi
diff --git a/configure.ac b/configure.ac
index f5f5dc02..779b57e3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,14 +44,14 @@ AS_CASE([$host_os],
 )
 AM_CONDITIONAL(TARGET_OS_OSX, test "x$os_osx" == xyes)
 
-AC_ARG_ENABLE([audio-callback], [AS_HELP_STRING([--enable-audio-callback], [enable callback-based audio I/O])], [], [enable_audio_callback=yes])
+AC_ARG_ENABLE([audio-callback], [AS_HELP_STRING([--enable-audio-callback=yes|no], [toggle callback-based audio I/O [default=yes]])], [], [enable_audio_callback=yes])
 AM_CONDITIONAL(ENABLE_AUDIO_CALLBACK, test "x$enable_audio_callback" == xyes)
 
 AS_IF([test "x$os_osx" != xyes && test "x$enable_audio_callback" != xyes], [ # Linux
 	AC_CHECK_LIB([dl], [dlopen])
 
-	AC_ARG_WITH([pulse], [AS_HELP_STRING([--without-pulse], [disable PulseAudio support])], [], [with_pulse=yes])
-	AC_ARG_WITH([alsa], [AS_HELP_STRING([--without-alsa], [disable ALSA support])], [], [with_alsa=yes])
+	AC_ARG_WITH([pulse], [AS_HELP_STRING([--with-pulse=yes|no], [toggle PulseAudio support, ignored if audio callbacks are enabled [default=yes]])], [], [with_pulse=yes])
+	AC_ARG_WITH([alsa], [AS_HELP_STRING([--with-alsa=yes|no], [toggle ALSA support, ignored if audio callbacks are enabled [default=yes]])], [], [with_alsa=yes])
 
 	AS_IF([test "x$with_pulse" == xno && test "x$with_alsa" == xno], [
 		AC_MSG_FAILURE([You can only disable either ALSA or PulseAudio, not both]);
@@ -61,7 +61,7 @@ AS_IF([test "x$os_osx" != xyes && test "x$enable_audio_callback" != xyes], [ # L
 		AC_CHECK_LIB([pulse], [pa_context_new], [
 			AS_ECHO_N( ) # what is the proper way to check for a library without linking it?
 		], [
-			AC_MSG_FAILURE([libpulse-dev is required during build, but you don't have it installed. Use --without-pulse to disable PulseAudio support.])
+			AC_MSG_FAILURE([libpulse-dev is required during build, but you don't have it installed. Use --with-pulse=no to disable PulseAudio support.])
 		])
 	], [
 		AC_DEFINE([WITHOUT_PULSE], [1], [Define to disable PulseAudio support])
@@ -71,7 +71,7 @@ AS_IF([test "x$os_osx" != xyes && test "x$enable_audio_callback" != xyes], [ # L
 		AC_CHECK_LIB([asound], [snd_pcm_open], [
 			AS_ECHO_N( ) # what is the proper way to check for a library without linking it?
 		], [
-			AC_MSG_FAILURE([libasound-dev is required during build, but you don't have it installed. Use --without-alsa to disable ALSA support.])
+			AC_MSG_FAILURE([libasound-dev is required during build, but you don't have it installed. Use --with-alsa=no to disable ALSA support.])
 		])
 	], [
 		AC_DEFINE([WITHOUT_ALSA], [1], [Define to disable ALSA support])