diff --git a/autotest/ZstdTest/ZstdTest.cpp b/autotest/ZstdTest/ZstdTest.cpp
index 83d654b21..7bb41aa74 100644
--- a/autotest/ZstdTest/ZstdTest.cpp
+++ b/autotest/ZstdTest/ZstdTest.cpp
@@ -57,7 +57,7 @@ CONSOLE_APP_MAIN
 				        FileIn  in(file);
 				        FileOut out(zstd);
 				        ZstdCompressStream zstd(out);
-				        zstd.Concurrent(concurrent);
+				        zstd.Co(concurrent);
 				        int ch = 0;
 				        for(;;) {
 				            String data = in.Get(smll ? (++ch & 511) + 1 : 1024*1024);
@@ -74,7 +74,7 @@ CONSOLE_APP_MAIN
 				        FileIn  in(zstd);
 				        FileOut out(dec);
 				        ZstdDecompressStream zstd(in);
-				        zstd.Concurrent(concurrent);
+				        zstd.Co(concurrent);
 				        int ch = 0;
 				        for(;;) {
 				            String data = zstd.Get(smll ? (++ch & 511) + 1 : 1024*1024);
diff --git a/autotest/lz4test/lz4test.cpp b/autotest/lz4test/lz4test.cpp
index 705be4a3a..a8d336860 100644
--- a/autotest/lz4test/lz4test.cpp
+++ b/autotest/lz4test/lz4test.cpp
@@ -57,7 +57,7 @@ CONSOLE_APP_MAIN
 				        FileIn  in(file);
 				        FileOut out(lz4);
 				        LZ4CompressStream lz4(out);
-				        lz4.Concurrent(concurrent);
+				        lz4.Co(concurrent);
 				        int ch = 0;
 				        for(;;) {
 				            String data = in.Get(smll ? (++ch & 511) + 1 : 1024*1024);
@@ -72,7 +72,7 @@ CONSOLE_APP_MAIN
 				        FileIn  in(lz4);
 				        FileOut out(dec);
 				        LZ4DecompressStream lz4(in);
-				        lz4.Concurrent(concurrent);
+				        lz4.Co(concurrent);
 				        int ch = 0;
 				        for(;;) {
 				            String data = lz4.Get(smll ? (++ch & 511) + 1 : 1024*1024);