diff --git a/include/btchip_helpers.h b/include/btchip_helpers.h
index e1e7f1e..eb65052 100644
--- a/include/btchip_helpers.h
+++ b/include/btchip_helpers.h
@@ -26,11 +26,6 @@
 
 #define OUTPUT_SCRIPT_NATIVE_WITNESS_PROGRAM_OFFSET 3
 
-#ifdef HAVE_GROESTL
-#include "cx_ram.h"
-extern union cx_u G_cx;
-#endif // HAVE_GROESTL
-
 unsigned char btchip_output_script_is_regular(unsigned char *buffer);
 unsigned char btchip_output_script_is_p2sh(unsigned char *buffer);
 unsigned char btchip_output_script_is_op_return(unsigned char *buffer);
diff --git a/src/btchip_helpers.c b/src/btchip_helpers.c
index 8afaab8..cff1550 100644
--- a/src/btchip_helpers.c
+++ b/src/btchip_helpers.c
@@ -18,10 +18,6 @@
 #include "btchip_apdu_constants.h"
 #include "btchip_internal.h"
 
-#ifdef HAVE_GROESTL
-union cx_u G_cx;
-#endif // HAVE_GROESTL
-
 const unsigned char TRANSACTION_OUTPUT_SCRIPT_PRE[] = {
     0x19, 0x76, 0xA9,
     0x14}; // script length, OP_DUP, OP_HASH160, address length