diff --git a/libfreerdp/core/childsession.c b/libfreerdp/core/childsession.c
index 51973d5d8..bcc58e364 100644
--- a/libfreerdp/core/childsession.c
+++ b/libfreerdp/core/childsession.c
@@ -256,7 +256,11 @@ static int transport_bio_named_puts(BIO* bio, const char* str)
 	WINPR_ASSERT(bio);
 	WINPR_ASSERT(str);
 
-	return transport_bio_named_write(bio, str, (int)strnlen(str, INT32_MAX));
+	const int max = (INT_MAX > SIZE_MAX) ? SIZE_MAX : INT_MAX;
+	const size_t len = strnlen(str, max);
+	if (len >= max)
+		return -1;
+	return transport_bio_named_write(bio, str, WINPR_ASSERTING_INT_CAST(int, len));
 }
 
 static int transport_bio_named_gets(BIO* bio, char* str, int size)
diff --git a/libfreerdp/core/gateway/tsg.c b/libfreerdp/core/gateway/tsg.c
index 85640f820..dbfdf77bf 100644
--- a/libfreerdp/core/gateway/tsg.c
+++ b/libfreerdp/core/gateway/tsg.c
@@ -2961,7 +2961,7 @@ static int transport_bio_tsg_puts(BIO* bio, const char* str)
 {
 	WINPR_UNUSED(bio);
 	WINPR_UNUSED(str);
-	return 1;
+	return -2;
 }
 
 // NOLINTNEXTLINE(readability-non-const-parameter)
diff --git a/libfreerdp/core/tcp.c b/libfreerdp/core/tcp.c
index 456ba84b6..f76081daa 100644
--- a/libfreerdp/core/tcp.c
+++ b/libfreerdp/core/tcp.c
@@ -174,7 +174,7 @@ static int transport_bio_simple_read(BIO* bio, char* buf, int size)
 
 static int transport_bio_simple_puts(WINPR_ATTR_UNUSED BIO* bio, WINPR_ATTR_UNUSED const char* str)
 {
-	return 1;
+	return -2;
 }
 
 static int transport_bio_simple_gets(WINPR_ATTR_UNUSED BIO* bio, WINPR_ATTR_UNUSED char* str,
diff --git a/libfreerdp/core/transport.c b/libfreerdp/core/transport.c
index 4ccdb37dd..b3ab34e82 100644
--- a/libfreerdp/core/transport.c
+++ b/libfreerdp/core/transport.c
@@ -2012,7 +2012,7 @@ static int transport_layer_bio_read(BIO* bio, char* buf, int size)
 
 static int transport_layer_bio_puts(WINPR_ATTR_UNUSED BIO* bio, WINPR_ATTR_UNUSED const char* str)
 {
-	return 1;
+	return -2;
 }
 
 static int transport_layer_bio_gets(WINPR_ATTR_UNUSED BIO* bio, WINPR_ATTR_UNUSED char* str,