diff --git a/ChangeLog.d/do-not-use-obsolete-header.txt b/ChangeLog.d/do-not-use-obsolete-header.txt
new file mode 100644
index 000000000..9a57ef16b
--- /dev/null
+++ b/ChangeLog.d/do-not-use-obsolete-header.txt
@@ -0,0 +1,5 @@
+Bugfix
+   * Don't use the obsolete header path sys/fcntl.h in unit tests.
+     These header files cause compilation errors in musl.
+     Fixes #4969.
+
diff --git a/tests/suites/test_suite_net.function b/tests/suites/test_suite_net.function
index f429fc922..513b72364 100644
--- a/tests/suites/test_suite_net.function
+++ b/tests/suites/test_suite_net.function
@@ -9,11 +9,11 @@
 #endif
 
 #if defined(MBEDTLS_PLATFORM_IS_UNIXLIKE)
-#include <sys/fcntl.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <fcntl.h>
 #include <unistd.h>
 #endif