diff --git a/SConscript.firmware b/SConscript.firmware
index 7b66b6fa6..fcc9dee2f 100644
--- a/SConscript.firmware
+++ b/SConscript.firmware
@@ -29,7 +29,6 @@ CPPDEFINES_MOD += [
     'AES_128',
     'AES_192',
     'RAND_PLATFORM_INDEPENDENT',
-    ('USE_BIP39_CACHE', '0'),
     ('USE_KECCAK', '1'),
     ('USE_ETHEREUM', '1'),
     ('USE_MONERO', '1'),
diff --git a/SConscript.unix b/SConscript.unix
index a6b23ea02..3ba197eaa 100644
--- a/SConscript.unix
+++ b/SConscript.unix
@@ -27,7 +27,6 @@ CPPPATH_MOD += [
 CPPDEFINES_MOD += [
     'AES_128',
     'AES_192',
-    ('USE_BIP39_CACHE', '0'),
     ('USE_KECCAK', '1'),
     ('USE_ETHEREUM', '1'),
     ('USE_MONERO', '1'),