diff --git a/libswresample/options.c b/libswresample/options.c
index fb109fdbab..d8cf85c053 100644
--- a/libswresample/options.c
+++ b/libswresample/options.c
@@ -171,6 +171,7 @@ av_cold struct SwrContext *swr_alloc(void){
     if(s){
         s->av_class= &av_class;
         av_opt_set_defaults(s);
+        s->firstpts = AV_NOPTS_VALUE;
     }
     return s;
 }
diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index f2a9b40474..1cf83a803f 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -375,8 +375,9 @@ av_cold int swr_init(struct SwrContext *s){
     if (s->firstpts_in_samples != AV_NOPTS_VALUE) {
         if (!s->async && s->min_compensation >= FLT_MAX/2)
             s->async = 1;
-        s->firstpts =
-        s->outpts   = s->firstpts_in_samples * s->out_sample_rate;
+        if (s->firstpts == AV_NOPTS_VALUE)
+            s->firstpts =
+            s->outpts   = s->firstpts_in_samples * s->out_sample_rate;
     } else
         s->firstpts = AV_NOPTS_VALUE;
 
diff --git a/tests/fate/libswresample.mak b/tests/fate/libswresample.mak
index f2108016af..0d29f76024 100644
--- a/tests/fate/libswresample.mak
+++ b/tests/fate/libswresample.mak
@@ -1082,6 +1082,9 @@ $(call CROSS_TEST,$(SAMPLERATES_LITE),ARESAMPLE_EXACT_LIN_ASYNC,s32p,s32le,s16)
 $(call CROSS_TEST,$(SAMPLERATES_LITE),ARESAMPLE_EXACT_LIN_ASYNC,fltp,f32le,s16)
 $(call CROSS_TEST,$(SAMPLERATES_LITE),ARESAMPLE_EXACT_LIN_ASYNC,dblp,f64le,s16)
 
+FATE_SWR_RESAMPLE-$(call FILTERDEMDEC, ARESAMPLE ASETPTS ATRIM SINE, , PCM_S16LE, LAVFI_INDEV) += fate-swr-async-firstpts
+fate-swr-async-firstpts: CMD = framecrc -auto_conversion_filters -copyts -f lavfi -i "sine=r=1000:samples_per_frame=100,asetpts=PTS+S+S*floor(ld(1)/4)+st(1\,ld(1)+1)*0,atrim=end=2" -filter:a aresample=async=300:first_pts=0
+
 FATE_SWR_RESAMPLE-$(call FILTERDEMDECENCMUX, ARESAMPLE, WAV, PCM_S16LE, PCM_S16LE, WAV) += $(FATE_SWR_RESAMPLE)
 fate-swr-resample: $(FATE_SWR_RESAMPLE-yes)
 FATE_SWR += $(FATE_SWR_RESAMPLE-yes)
diff --git a/tests/ref/fate/swr-async-firstpts b/tests/ref/fate/swr-async-firstpts
new file mode 100644
index 0000000000..3f6b290bab
--- /dev/null
+++ b/tests/ref/fate/swr-async-firstpts
@@ -0,0 +1,24 @@
+#tb 0: 1/1000
+#media_type 0: audio
+#codec_id 0: pcm_s16le
+#sample_rate 0: 1000
+#channel_layout_name 0: mono
+0,          0,          0,      132,      264, 0xc2981f45
+0,        132,        132,       68,      136, 0xe78e468d
+0,        200,        200,      100,      200, 0xd55c67d0
+0,        300,        300,      100,      200, 0xd55c67d0
+0,        400,        400,      100,      200, 0xd55c67d0
+0,        500,        500,       93,      186, 0x85ca5db4
+0,        593,        593,      110,      220, 0xa2655d0b
+0,        703,        703,      108,      216, 0x95cb6f01
+0,        811,        811,      108,      216, 0xf35668b8
+0,        919,        919,      149,      298, 0xc273245f
+0,       1068,       1068,      136,      272, 0xedeb6e0a
+0,       1204,       1204,       98,      196, 0xea18668e
+0,       1302,       1302,       98,      196, 0x412861e7
+0,       1400,       1400,       98,      196, 0x7ec361b2
+0,       1498,       1498,      110,      220, 0xf3ae6a6a
+0,       1608,       1608,      108,      216, 0xab2f6c93
+0,       1716,       1716,      107,      214, 0x50de6eb9
+0,       1823,       1823,      106,      212, 0x67b8656d
+0,       1929,       1929,       18,       36, 0x2b7911c6