diff --git a/CMakeLists.txt b/CMakeLists.txt
index 47f1299..125dc22 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,6 +103,7 @@ SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} /wd4334")	# result of 32-bit shift implici
 SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} /wd4456")	# hide previous local declaration
 SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} /wd4459")	# hide global declaration
 SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} /wd4706")	# assignment within conditional expression
+SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} /wd4090")	# different 'const' qualifier (TODO: debug ls-sfparser.c)
 SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -W4 -WX -Zi -DWIN32_LEAN_AND_MEAN -DNOMINMAX -D_CRT_SECURE_NO_WARNINGS -I${CMAKE_CURRENT_SOURCE_DIR}/wincompat")
 IF(CMAKE_BUILD_TYPE STREQUAL "Debug")
     SET(MY_CMAKE_FLAGS "${MY_CMAKE_FLAGS} -Od")
diff --git a/src/liblsquic/lsquic_handshake.c b/src/liblsquic/lsquic_handshake.c
index 90d607b..871d24b 100644
--- a/src/liblsquic/lsquic_handshake.c
+++ b/src/liblsquic/lsquic_handshake.c
@@ -11,6 +11,8 @@
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
+#else
+#include <malloc.h>
 #endif
 
 #include <openssl/ssl.h>
@@ -1977,7 +1979,7 @@ gen_rej1_data (struct lsquic_enc_session *enc_session, uint8_t *data,
 #ifndef WIN32
     char prof_buf[prof_len];
 #else
-    prof_buf = _malloca(prof_len);
+    char *prof_buf = _malloca(prof_len);
     if (!prof_buf)
         return -1;
 #endif
diff --git a/tests/test_h3_framing.c b/tests/test_h3_framing.c
index 4578eb8..d6bc74d 100644
--- a/tests/test_h3_framing.c
+++ b/tests/test_h3_framing.c
@@ -1223,11 +1223,11 @@ test_frame_header_split (unsigned n_packets, unsigned extra_sz,
     const ssize_t w = lsquic_stream_write(stream, buf_in, buf_in_sz);
     assert(w >= 0 && (size_t) w == buf_in_sz);
     n_frames = count_hq_frames(stream);
-    assert(n_frames == 1 + (w > 0));
+    assert((int) n_frames == 1 + (w > 0));
 
     lsquic_stream_flush(stream);
     n_frames = count_hq_frames(stream);
-    assert(n_frames == !!stream->sm_n_buffered);
+    assert((int) n_frames == !!stream->sm_n_buffered);
 
     if (add_one_more)
     {