diff --git a/cpu/decoder.cpp b/cpu/decoder.cpp
index 176232c..86ece07 100644
--- a/cpu/decoder.cpp
+++ b/cpu/decoder.cpp
@@ -13,7 +13,9 @@ void Cpu::executeInstruction()
   opcode_t op = readPC8();
   int mcycles = 1;
 
+#if 0
   printf("@0x%04x: opcode %02X\n",currentpc,op);
+#endif
 
   if ((op & 0xC0) == 0x40 && op != 0x76) // LD r, r'
     {