diff --git a/src/common/boot_picobin_headers/include/boot/picobin.h b/src/common/boot_picobin_headers/include/boot/picobin.h
index 40a058007..25308478b 100644
--- a/src/common/boot_picobin_headers/include/boot/picobin.h
+++ b/src/common/boot_picobin_headers/include/boot/picobin.h
@@ -52,6 +52,7 @@
 
 // ----
 
+#define _PICOBIN_INDEX_TO_BITS(y, x) (y ## x << y ## _LSB)
 #define PICOBIN_INDEX_TO_BITS(y, x) (y ## _ ## x << y ## _LSB)
 
 #define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_LSB            _u(0)
@@ -59,27 +60,27 @@
 #define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_INVALID        _u(0x0)
 #define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_EXE            _u(0x1)
 #define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_DATA           _u(0x2)
-#define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_AS_BITS(x) PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_IMAGE_TYPE, x)
+#define PICOBIN_IMAGE_TYPE_IMAGE_TYPE_AS_BITS(x) _PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_IMAGE_TYPE, _ ## x)
 
 #define PICOBIN_IMAGE_TYPE_EXE_SECURITY_LSB          _u(4)
 #define PICOBIN_IMAGE_TYPE_EXE_SECURITY_BITS         _u(0x0030)
 #define PICOBIN_IMAGE_TYPE_EXE_SECURITY_UNSPECIFIED  _u(0x0)
 #define PICOBIN_IMAGE_TYPE_EXE_SECURITY_NS           _u(0x1)
 #define PICOBIN_IMAGE_TYPE_EXE_SECURITY_S            _u(0x2)
-#define PICOBIN_IMAGE_TYPE_EXE_SECURITY_AS_BITS(x) PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_SECURITY, x)
+#define PICOBIN_IMAGE_TYPE_EXE_SECURITY_AS_BITS(x) _PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_SECURITY, _ ## x)
 
 #define PICOBIN_IMAGE_TYPE_EXE_CPU_LSB               _u(8)
 #define PICOBIN_IMAGE_TYPE_EXE_CPU_BITS              _u(0x0700)
 #define PICOBIN_IMAGE_TYPE_EXE_CPU_ARM               _u(0)
 #define PICOBIN_IMAGE_TYPE_EXE_CPU_RISCV             _u(1)
 #define PICOBIN_IMAGE_TYPE_EXE_CPU_VARMULET          _u(2)
-#define PICOBIN_IMAGE_TYPE_EXE_CPU_AS_BITS(x) PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_CPU, x)
+#define PICOBIN_IMAGE_TYPE_EXE_CPU_AS_BITS(x) _PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_CPU, _ ## x)
 
 #define PICOBIN_IMAGE_TYPE_EXE_CHIP_LSB              _u(12)
 #define PICOBIN_IMAGE_TYPE_EXE_CHIP_BITS             _u(0x7000)
 #define PICOBIN_IMAGE_TYPE_EXE_CHIP_RP2040           _u(0)
 #define PICOBIN_IMAGE_TYPE_EXE_CHIP_RP2350           _u(1)
-#define PICOBIN_IMAGE_TYPE_EXE_CHIP_AS_BITS(x) PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_CHIP, x)
+#define PICOBIN_IMAGE_TYPE_EXE_CHIP_AS_BITS(x) _PICOBIN_INDEX_TO_BITS(PICOBIN_IMAGE_TYPE_EXE_CHIP, _ ## x)
 
 #define PICOBIN_IMAGE_TYPE_EXE_TBYB_BITS             _u(0x8000)
 
@@ -135,7 +136,7 @@
 #define PICOBIN_PARTITION_FLAGS_LINK_TYPE_NONE                        _u(0)
 #define PICOBIN_PARTITION_FLAGS_LINK_TYPE_A_PARTITION                 _u(1)
 #define PICOBIN_PARTITION_FLAGS_LINK_TYPE_OWNER_PARTITION             _u(2)
-#define PICOBIN_PARTITION_FLAGS_LINK_TYPE_AS_BITS(x) PICOBIN_INDEX_TO_BITS(PICOBIN_PARTITION_FLAGS_LINK_TYPE, x)
+#define PICOBIN_PARTITION_FLAGS_LINK_TYPE_AS_BITS(x) _PICOBIN_INDEX_TO_BITS(PICOBIN_PARTITION_FLAGS_LINK_TYPE, _ ## x)
 
 
 #define PICOBIN_HASH_SHA256                    _u(0x01)