--- channels/chan_zap.c	2005-11-05 19:53:08.000000000 -0700
+++ channels/chan_zap.c.new	2005-11-05 19:47:34.000000000 -0700
@@ -2937,10 +2937,12 @@
 	val = 0;
 	ioctl(p->subs[SUB_REAL].zfd, ZT_TONEDETECT, &val);
 #endif		
+#ifdef ZAPATA_PRI
 	if (!p->hardwaredtmf && p->dsp) {
 		p->dsp_features &= ~DSP_FEATURE_DTMF_DETECT;
 		ast_dsp_set_features(p->dsp, p->dsp_features);
 	}
+#endif
 }
 
 static void enable_dtmf_detect(struct zt_pvt *p)
@@ -2955,10 +2957,12 @@
 	val = ZT_TONEDETECT_ON | ZT_TONEDETECT_MUTE;
 	ioctl(p->subs[SUB_REAL].zfd, ZT_TONEDETECT, &val);
 #endif		
+#ifdef ZAPATA_PRI
 	if (!p->hardwaredtmf && p->dsp) {
 		p->dsp_features |= DSP_FEATURE_DTMF_DETECT;
 		ast_dsp_set_features(p->dsp, p->dsp_features);
 	}
+#endif
 }
 
 static enum ast_bridge_result zt_bridge(struct ast_channel *c0, struct ast_channel *c1, int flags, struct ast_frame **fo, struct ast_channel **rc, int timeoutms)