diff --git a/SConscript.firmware b/SConscript.firmware
index 7e2a062ae1..ef3de4cb3b 100644
--- a/SConscript.firmware
+++ b/SConscript.firmware
@@ -25,6 +25,7 @@ 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 346b3bfec8..7fadbb87ec 100644
--- a/SConscript.unix
+++ b/SConscript.unix
@@ -23,6 +23,7 @@ CPPPATH_MOD += [
 CPPDEFINES_MOD += [
     'AES_128',
     'AES_192',
+    ('USE_BIP39_CACHE', '0'),
     ('USE_KECCAK', '1'),
     ('USE_ETHEREUM', '1'),
     ('USE_MONERO', '1'),