diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
index a7fcf084fa60cc..0e529d221495ee 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationClient.cpp
@@ -590,7 +590,7 @@ DataBufferSP GDBRemoteCommunicationClient::ReadMemoryTags(lldb::addr_t addr,
                                                           size_t len,
                                                           int32_t type) {
   StreamString packet;
-  packet.Printf("qMemTags:%lx,%lx:%x", addr, len, type);
+  packet.Printf("qMemTags:%" PRIx64 ",%zx:%" PRIx32, addr, len, type);
   StringExtractorGDBRemote response;
 
   Log *log = ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(GDBR_LOG_MEMORY);
diff --git a/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp b/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
index 91e63451d949c6..b9fc107527a21c 100644
--- a/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
+++ b/lldb/unittests/Process/gdb-remote/GDBRemoteCommunicationClientTest.cpp
@@ -465,7 +465,7 @@ TEST_F(GDBRemoteCommunicationClientTest, GetQOffsets) {
   EXPECT_EQ(llvm::None, GetQOffsets("TextSeg=0x1234"));
   EXPECT_EQ(llvm::None, GetQOffsets("TextSeg=12345678123456789"));
 }
-#if 0
+
 static void
 check_qmemtags(TestClient &client, MockServer &server, size_t read_len,
                const char *packet, llvm::StringRef response,
@@ -530,4 +530,3 @@ TEST_F(GDBRemoteCommunicationClientTest, ReadMemoryTags) {
   check_qmemtags(client, server, 32, "qMemTags:def0,20:1", "m01020",
                  llvm::None);
 }
-#endif