diff --git a/decode.c b/decode.c
index d806080..74244da 100644
--- a/decode.c
+++ b/decode.c
@@ -179,7 +179,7 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
         if (table_entry & 1) {
             if (UNLIKELY(off >= len))
                 return FD_ERR_PARTIAL;
-            unsigned isreg = (buffer[off] & 0xc0) == 0xc0 ? 8 : 0;
+            unsigned isreg = buffer[off] >= 0xc0 ? 8 : 0;
             table_entry = table_walk(table_entry, ((buffer[off] >> 3) & 7) | isreg);
             // table_entry kinds: INSTR(0), T8E(1)
             if (table_entry & 1)
@@ -314,7 +314,7 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
     if (table_entry & 1) {
         if (UNLIKELY(off >= len))
             return FD_ERR_PARTIAL;
-        unsigned isreg = (buffer[off] & 0xc0) == 0xc0 ? 8 : 0;
+        unsigned isreg = buffer[off] >= 0xc0 ? 8 : 0;
         table_entry = table_walk(table_entry, ((buffer[off] >> 3) & 7) | isreg);
         // table_entry kinds: INSTR(0), T8E(1), TVEX(2)
         if (table_entry & 1)