diff --git a/thirdparty/tccbin_automation/bin/live_state.v b/thirdparty/tccbin_automation/bin/live_state.v
index 9370aa4b2d..cc51c9c42b 100644
--- a/thirdparty/tccbin_automation/bin/live_state.v
+++ b/thirdparty/tccbin_automation/bin/live_state.v
@@ -1858,7 +1858,7 @@ fn durable_git_child_failure(message string, code int) {
 		mut offset := 0
 		for offset < message.len {
 			remaining := unsafe { message.str + offset }
-			written := C.write(2, voidptr(remaining), usize(message.len - offset))
+			written := C.write(2, voidptr(remaining), uint(message.len - offset))
 			if written > 0 {
 				offset += written
 				continue
@@ -2109,7 +2109,7 @@ fn durable_git_read_pipe(fd int, mut output []u8, eof bool, limit int,
 	$if linux || macos || freebsd || openbsd {
 		mut buffer := [8192]u8{}
 		mut observed_combined := combined
-		read := C.read(fd, voidptr(&buffer[0]), usize(buffer.len))
+		read := C.read(fd, voidptr(&buffer[0]), uint(buffer.len))
 		if read > 0 {
 			observed_combined += read
 			if output.len + read > limit || observed_combined > limit + durable_git_stderr_max_bytes {
diff --git a/vlib/gg/multiwindow_sgl_load_proof_d_gg_multiwindow.v b/vlib/gg/multiwindow_sgl_load_proof_d_gg_multiwindow.v
index 9fc6c59a63..211b6ec75e 100644
--- a/vlib/gg/multiwindow_sgl_load_proof_d_gg_multiwindow.v
+++ b/vlib/gg/multiwindow_sgl_load_proof_d_gg_multiwindow.v
@@ -97,7 +97,7 @@ $if test {
 			window:      window
 			// render.Context has no int id; its own address is a stable identity
 			// for the lifetime of the context, and is never nil here.
-			context_id:  unsafe { u64(usize(voidptr(context))) }
+			context_id:  unsafe { u64(uint(voidptr(context))) }
 			target_key:  target_key
 		}
 		multiwindow_sgl_load_proof.count++
diff --git a/vlib/gg/render/context.v b/vlib/gg/render/context.v
index 2723c38215..11c2d3bba8 100644
--- a/vlib/gg/render/context.v
+++ b/vlib/gg/render/context.v
@@ -125,7 +125,7 @@ pub fn new_context(desc Desc) &Context {
 
 	if gfx.is_valid() {
 		buf_desc := gfx.BufferDesc{
-			size:  usize(max_v) * usize(sizeof(Vertex))
+			size:  uint(max_v) * uint(sizeof(Vertex))
 			type:  .vertexbuffer
 			usage: .stream
 		}
diff --git a/vlib/gg/render/context_api.v b/vlib/gg/render/context_api.v
index 02712030b9..674d5d0f90 100644
--- a/vlib/gg/render/context_api.v
+++ b/vlib/gg/render/context_api.v
@@ -508,7 +508,7 @@ pub fn (ctx &Context) draw() {
 	if st.update_frame_id != st.frame_id {
 		st.update_frame_id = st.frame_id
 		if gfx.is_valid() {
-			rng := gfx.Range{ ptr: &st.verts[0], size: usize(st.vertex_count) * usize(sizeof(Vertex)) }
+			rng := gfx.Range{ ptr: &st.verts[0], size: uint(st.vertex_count) * uint(sizeof(Vertex)) }
 			gfx.update_buffer(st.vbuf, &rng)
 		}
 	}
diff --git a/vlib/net/openssl/ssl_upgrade.c.v b/vlib/net/openssl/ssl_upgrade.c.v
index 9e803bd289..0475dbc12f 100644
--- a/vlib/net/openssl/ssl_upgrade.c.v
+++ b/vlib/net/openssl/ssl_upgrade.c.v
@@ -20,13 +20,13 @@ pub fn new_ssl_server_conn(mut tcp_conn net.TcpConn, config SSLConnectConfig) !&
 
 	if config.in_memory_verification {
 		mut res := C.v_net_openssl_SSL_CTX_use_certificate_chain_memory(sslctx,
-			config.cert.str, usize(config.cert.len))
+			config.cert.str, uint(config.cert.len))
 		if res != 1 {
 			C.SSL_CTX_free(sslctx)
 			return error('net.openssl new_ssl_server_conn, could not load certificate from memory')
 		}
 		res = C.v_net_openssl_SSL_CTX_use_PrivateKey_memory(sslctx, config.cert_key.str,
-			usize(config.cert_key.len))
+			uint(config.cert_key.len))
 		if res != 1 {
 			C.SSL_CTX_free(sslctx)
 			return error('net.openssl new_ssl_server_conn, could not load private key from memory')
diff --git a/vlib/strconv/format_thousands_test.v b/vlib/strconv/format_thousands_test.v
index fd4e4e12b6..e4e8cab38a 100644
--- a/vlib/strconv/format_thousands_test.v
+++ b/vlib/strconv/format_thousands_test.v
@@ -102,4 +102,5 @@ fn test_format_thousands_float_non_finite() {
 
 fn test_format_legacy_signed_integer() {
 	assert format_thousands(isize(-1234567), ',') == '-1,234,567'
+	assert grouped(isize(-1234567)) == '-1,234,567'
 }
diff --git a/vlib/x/multiwindow/appkit_backend.v b/vlib/x/multiwindow/appkit_backend.v
index fd20e55afc..4e23eb7b4e 100644
--- a/vlib/x/multiwindow/appkit_backend.v
+++ b/vlib/x/multiwindow/appkit_backend.v
@@ -4,9 +4,9 @@ $if darwin {
 	import macos
 	import math
 
-	fn C.strlen(s &char) usize
-	fn C.calloc(n usize, size usize) voidptr
-	fn C.memcpy(dest voidptr, src voidptr, n usize) voidptr
+	fn C.strlen(s &char) uint
+	fn C.calloc(n uint, size uint) voidptr
+	fn C.memcpy(dest voidptr, src voidptr, n uint) voidptr
 
 	@[export: 'v_multiwindow_appkit_string']
 	fn v_multiwindow_appkit_string(value &char) voidptr {
@@ -51,7 +51,7 @@ $if darwin {
 		if value == unsafe { nil } {
 			return unsafe { nil }
 		}
-		len := usize(C.strlen(value))
+		len := uint(C.strlen(value))
 		copy := &char(C.calloc(len + 1, 1))
 		if copy == unsafe { nil } {
 			return unsafe { nil }