diff --git a/ports/unix/mpconfigport.h b/ports/unix/mpconfigport.h
index a483c3e086..232bfb857c 100644
--- a/ports/unix/mpconfigport.h
+++ b/ports/unix/mpconfigport.h
@@ -179,8 +179,11 @@
 #define MICROPY_PY_UHASHLIB_SHA1    (1)
 #define MICROPY_PY_UCRYPTOLIB       (1)
 #endif
+#ifndef MICROPY_PY_USELECT
+#define MICROPY_PY_USELECT          (0)
+#endif
 #ifndef MICROPY_PY_USELECT_POSIX
-#define MICROPY_PY_USELECT_POSIX    (1)
+#define MICROPY_PY_USELECT_POSIX    (!MICROPY_PY_USELECT)
 #endif
 #define MICROPY_PY_UWEBSOCKET       (1)
 #define MICROPY_PY_MACHINE          (1)
diff --git a/ports/unix/variants/coverage/mpconfigvariant.h b/ports/unix/variants/coverage/mpconfigvariant.h
index bf68dcb63a..47ed4bc46c 100644
--- a/ports/unix/variants/coverage/mpconfigvariant.h
+++ b/ports/unix/variants/coverage/mpconfigvariant.h
@@ -33,7 +33,6 @@
 // Disable some features that come enabled by default with the feature level.
 #define MICROPY_PY_BUILTINS_EXECFILE            (0)
 #define MICROPY_PY_SYS_STDIO_BUFFER             (0)
-#define MICROPY_PY_USELECT                      (0)
 
 // Enable additional features.
 #define MICROPY_DEBUG_PARSE_RULE_NAME  (1)
diff --git a/ports/unix/variants/dev/mpconfigvariant.h b/ports/unix/variants/dev/mpconfigvariant.h
index 61092394cd..0603394247 100644
--- a/ports/unix/variants/dev/mpconfigvariant.h
+++ b/ports/unix/variants/dev/mpconfigvariant.h
@@ -30,7 +30,6 @@
 // Disable some features that come enabled by default with the feature level.
 #define MICROPY_PY_BUILTINS_EXECFILE            (0)
 #define MICROPY_PY_SYS_STDIO_BUFFER             (0)
-#define MICROPY_PY_USELECT                      (0)
 
 // Enable some additional features.
 #define MICROPY_REPL_EMACS_WORDS_MOVE           (1)
diff --git a/ports/unix/variants/standard/mpconfigvariant.h b/ports/unix/variants/standard/mpconfigvariant.h
index 1ec46ef92d..31618652e9 100644
--- a/ports/unix/variants/standard/mpconfigvariant.h
+++ b/ports/unix/variants/standard/mpconfigvariant.h
@@ -38,7 +38,6 @@
 #define MICROPY_PY_MATH_FACTORIAL               (0)
 #define MICROPY_PY_SYS_PS1_PS2                  (0)
 #define MICROPY_PY_SYS_STDIO_BUFFER             (0)
-#define MICROPY_PY_USELECT                      (0)
 #define MICROPY_PY_UASYNCIO                     (0)
 #define MICROPY_PY_URE_SUB                      (0)
 #define MICROPY_PY_URANDOM_EXTRA_FUNCS          (0)