diff --git a/programs/zstdcli.c b/programs/zstdcli.c
index fbacb908..372b7d7a 100644
--- a/programs/zstdcli.c
+++ b/programs/zstdcli.c
@@ -1226,6 +1226,9 @@ int main(int argCount, const char* argv[])
     DISPLAYLEVEL(3, WELCOME_MESSAGE);
 
 #ifdef ZSTD_MULTITHREAD
+    if ((operation==zom_decompress) && (!singleThread) && (nbWorkers > 1)) {
+        DISPLAYLEVEL(2, "Warning : decompression does not support multi-threading\n");
+    }
     if ((nbWorkers==0) && (!singleThread)) {
         /* automatically set # workers based on # of reported cpus */
         if (defaultLogicalCores) {
diff --git a/tests/cli-tests/compression/multi-threaded.sh b/tests/cli-tests/compression/multi-threaded.sh
index e3961330..bd01448e 100755
--- a/tests/cli-tests/compression/multi-threaded.sh
+++ b/tests/cli-tests/compression/multi-threaded.sh
@@ -9,3 +9,7 @@ zstd --rsyncable -f file                ; zstd -t file.zst
 zstd -T0 -f file                        ; zstd -t file.zst
 zstd -T0 --auto-threads=logical -f file ; zstd -t file.zst
 zstd -T0 --auto-threads=physical -f file; zstd -t file.zst
+
+# multi-thread decompression warning test
+zstd -T0 -f file                        ; zstd -t file.zst; zstd -T0 -d file.zst -o file3
+zstd -T0 -f file                        ; zstd -t file.zst; zstd -T2 -d file.zst -o file4
diff --git a/tests/cli-tests/compression/multi-threaded.sh.stderr.exact b/tests/cli-tests/compression/multi-threaded.sh.stderr.exact
new file mode 100644
index 00000000..54d47d8b
--- /dev/null
+++ b/tests/cli-tests/compression/multi-threaded.sh.stderr.exact
@@ -0,0 +1 @@
+Warning : decompression does not support multi-threading