diff --git a/ports/cc3200/mpconfigport.h b/ports/cc3200/mpconfigport.h
index fe579c0874..d472d29f70 100644
--- a/ports/cc3200/mpconfigport.h
+++ b/ports/cc3200/mpconfigport.h
@@ -59,7 +59,6 @@
 #else
 #define MICROPY_CPYTHON_COMPAT                      (0)
 #endif
-#define MICROPY_QSTR_BYTES_IN_HASH                  (1)
 
 // fatfs configuration used in ffconf.h
 #define MICROPY_FATFS_ENABLE_LFN                    (2)
diff --git a/ports/nrf/mpconfigport.h b/ports/nrf/mpconfigport.h
index f3c08059a0..30625382e4 100644
--- a/ports/nrf/mpconfigport.h
+++ b/ports/nrf/mpconfigport.h
@@ -281,7 +281,6 @@
 #define MICROPY_PY_SYS                        (1)
 #define MICROPY_PY_SYS_PATH_ARGV_DEFAULTS     (1)
 #define MICROPY_PY___FILE__                   (1)
-#define MICROPY_QSTR_BYTES_IN_HASH            (2)
 #endif
 
 #ifndef MICROPY_PY_UBLUEPY
diff --git a/ports/pic16bit/mpconfigport.h b/ports/pic16bit/mpconfigport.h
index f1bfa4cd6f..a2d607fb29 100644
--- a/ports/pic16bit/mpconfigport.h
+++ b/ports/pic16bit/mpconfigport.h
@@ -29,7 +29,6 @@
 // options to control how MicroPython is built
 #define MICROPY_OBJ_REPR            (MICROPY_OBJ_REPR_B)
 #define MICROPY_ALLOC_PATH_MAX      (64)
-#define MICROPY_QSTR_BYTES_IN_HASH  (1)
 #define MICROPY_EMIT_X64            (0)
 #define MICROPY_EMIT_THUMB          (0)
 #define MICROPY_EMIT_INLINE_THUMB   (0)
diff --git a/ports/powerpc/mpconfigport.h b/ports/powerpc/mpconfigport.h
index 06200a9969..b74f374e7f 100644
--- a/ports/powerpc/mpconfigport.h
+++ b/ports/powerpc/mpconfigport.h
@@ -35,7 +35,6 @@
 
 // #define MICROPY_DEBUG_VERBOSE    (1)
 
-#define MICROPY_QSTR_BYTES_IN_HASH  (1)
 #define MICROPY_QSTR_EXTRA_POOL     mp_qstr_frozen_const_pool
 #define MICROPY_ALLOC_PATH_MAX      (256)
 #define MICROPY_EMIT_X64            (0)
diff --git a/ports/samd/mpconfigport.h b/ports/samd/mpconfigport.h
index 218e4bb96a..160442a400 100644
--- a/ports/samd/mpconfigport.h
+++ b/ports/samd/mpconfigport.h
@@ -35,7 +35,6 @@
 #define MICROPY_GC_STACK_ENTRY_TYPE         uint16_t
 #define MICROPY_GC_ALLOC_THRESHOLD          (0)
 #define MICROPY_ALLOC_PATH_MAX              (256)
-#define MICROPY_QSTR_BYTES_IN_HASH          (1)
 
 // MicroPython emitters
 #define MICROPY_PERSISTENT_CODE_LOAD        (1)
diff --git a/ports/unix/variants/minimal/mpconfigvariant.h b/ports/unix/variants/minimal/mpconfigvariant.h
index 0dbfbb3d1c..97ed786b8f 100644
--- a/ports/unix/variants/minimal/mpconfigvariant.h
+++ b/ports/unix/variants/minimal/mpconfigvariant.h
@@ -64,6 +64,3 @@
 // Enable just the sys and os built-in modules.
 #define MICROPY_PY_SYS (1)
 #define MICROPY_PY_OS (1)
-
-// The minimum sets this to 1 to save flash.
-#define MICROPY_QSTR_BYTES_IN_HASH (2)
diff --git a/py/mpconfig.h b/py/mpconfig.h
index a1e9660bf4..9a1f04568e 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -290,10 +290,12 @@
 
 // Number of bytes used to store qstr hash
 #ifndef MICROPY_QSTR_BYTES_IN_HASH
-#if MICROPY_CONFIG_ROM_LEVEL_AT_LEAST_CORE_FEATURES
+#if MICROPY_CONFIG_ROM_LEVEL_AT_LEAST_EXTRA_FEATURES
 #define MICROPY_QSTR_BYTES_IN_HASH (2)
-#else
+#elif MICROPY_CONFIG_ROM_LEVEL_AT_LEAST_CORE_FEATURES
 #define MICROPY_QSTR_BYTES_IN_HASH (1)
+#else
+#define MICROPY_QSTR_BYTES_IN_HASH (0)
 #endif
 #endif