diff --git a/Changes.txt b/Changes.txt
index 4981d09d3..f8f14a0e6 100644
--- a/Changes.txt
+++ b/Changes.txt
@@ -86,15 +86,15 @@
   * Added 'Options...' button to debugger which gives access to the options
     menu during debugging.
 
-  * Added debugger pseudo-register '_cycles', which gives the number of
-    CPU cycles of the last instruction.
-
   * Added debugger pseudo-register '_cyclesLo' and '_cyclesHi', which give
     the number of CPU cycles that have occurred since emulation started.
 
   * Added debugger pseudo-register '_fcycles', which gives the number of
     CPU cycles that have occurred since the frame started.
 
+  * Added debugger pseudo-register '_icycles', which gives the number of
+    CPU cycles of the last instruction.
+
   * Extended debugger 'dump' command to take a second argument, indicating
     the end of the range to dump data.
 
diff --git a/docs/debugger.html b/docs/debugger.html
index 08bb9149f..88d3eb3f2 100644
--- a/docs/debugger.html
+++ b/docs/debugger.html
@@ -738,11 +738,11 @@ that holds 'number of scanlines' on an actual console).</p>
 <tr><th>Function</th><th>Description</th></tr>
 <tr><td> _bank</td><td> Currently selected bank</td></tr>
 <tr><td> _cclocks</td><td> Color clocks on a scanline</td></tr>
-<tr><td> _cycles</td><td> Number of cycles of last instruction</td></tr>
 <tr><td> _cycleshi</td><td> Higher 32 bits of number of cycles since emulation started</td></tr>
 <tr><td> _cycleslo</td><td> Lower 32 bits of number of cycles since emulation started</td></tr>
 <tr><td> _fcount</td><td> Number of frames since emulation started</td></tr>
 <tr><td> _fcycles</td><td> Number of cycles since frame started</td></tr>
+<tr><td> _icycles</td><td> Number of cycles of last instruction</td></tr>
 <tr><td> _rwport</td><td> Last address to attempt a read from the cart write port</td></tr>
 <tr><td> _scan</td><td> Current scanline count</td></tr>
 <tr><td> _scycles</td><td> Number of cycles in current scanline</td></tr>
diff --git a/src/debugger/CpuDebug.cxx b/src/debugger/CpuDebug.cxx
index 1d1386b62..d90d22c8d 100644
--- a/src/debugger/CpuDebug.cxx
+++ b/src/debugger/CpuDebug.cxx
@@ -143,9 +143,9 @@ int CpuDebug::c() const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-int CpuDebug::cycles() const
+int CpuDebug::icycles() const
 {
-  return mySystem.m6502().cycles;
+  return mySystem.m6502().icycles;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
@@ -229,7 +229,7 @@ void CpuDebug::setC(bool on)
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void CpuDebug::setCycles(int cycles)
 {
-  my6502.cycles = cycles;
+  my6502.icycles = cycles;
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
diff --git a/src/debugger/CpuDebug.hxx b/src/debugger/CpuDebug.hxx
index 46889c945..41a0c7991 100644
--- a/src/debugger/CpuDebug.hxx
+++ b/src/debugger/CpuDebug.hxx
@@ -61,7 +61,7 @@ class CpuDebug : public DebuggerSystem
     int z() const;
     int c() const;
 
-    int cycles() const;
+    int icycles() const;
 
     void setPC(int pc);
     void setSP(int sp);
diff --git a/src/debugger/Debugger.cxx b/src/debugger/Debugger.cxx
index 549cd1dcb..308ec73a0 100644
--- a/src/debugger/Debugger.cxx
+++ b/src/debugger/Debugger.cxx
@@ -802,11 +802,11 @@ Debugger::BuiltinFunction Debugger::ourBuiltinFunctions[NUM_BUILTIN_FUNCS] = {
 Debugger::PseudoRegister Debugger::ourPseudoRegisters[NUM_PSEUDO_REGS] = {
   { "_bank",      "Currently selected bank" },
   { "_cclocks",   "Color clocks on current scanline" },
-  { "_cycles",    "Number of cycles of last instruction" },
   { "_cycleshi",  "Higher 32 bits of number of cycles since emulation started" },
   { "_cycleslo",  "Lower 32 bits of number of cycles since emulation started" },
   { "_fcount",    "Number of frames since emulation started" },
   { "_fcycles",   "Number of cycles since frame started" },
+  { "_icycles",    "Number of cycles of last instruction" },
   { "_rwport",    "Address at which a read from a write port occurred" },
   { "_scan",      "Current scanline count" },
   { "_scycles",   "Number of cycles in current scanline" },
diff --git a/src/emucore/M6502.cxx b/src/emucore/M6502.cxx
index ae16b9f64..21b49c3ed 100644
--- a/src/emucore/M6502.cxx
+++ b/src/emucore/M6502.cxx
@@ -52,7 +52,7 @@ M6502::M6502(const Settings& settings)
     mySettings(settings),
     A(0), X(0), Y(0), SP(0), IR(0), PC(0),
     N(false), V(false), B(false), D(false), I(false), notZ(false), C(false),
-    cycles(0),
+    icycles(0),
     myNumberOfDistinctAccesses(0),
     myLastAddress(0),
     myLastPeekAddress(0),
@@ -100,7 +100,7 @@ void M6502::reset()
   PS(BSPF::containsIgnoreCase(cpurandom, "P") ?
           mySystem->randGenerator().next() : 0x20);
 
-  cycles = 0;
+  icycles = 0;
 
   // Load PC from the reset vector
   PC = uInt16(mySystem->peek(0xfffc)) | (uInt16(mySystem->peek(0xfffd)) << 8);
@@ -127,7 +127,7 @@ inline uInt8 M6502::peek(uInt16 address, uInt8 flags)
   }
   ////////////////////////////////////////////////
   mySystem->incrementCycles(SYSTEM_CYCLES_PER_CPU);
-  cycles += SYSTEM_CYCLES_PER_CPU;
+  icycles += SYSTEM_CYCLES_PER_CPU;
   uInt8 result = mySystem->peek(address, flags);
   myLastPeekAddress = address;
 
@@ -161,7 +161,7 @@ inline void M6502::poke(uInt16 address, uInt8 value, uInt8 flags)
   }
   ////////////////////////////////////////////////
   mySystem->incrementCycles(SYSTEM_CYCLES_PER_CPU);
-  cycles += SYSTEM_CYCLES_PER_CPU;
+  icycles += SYSTEM_CYCLES_PER_CPU;
   mySystem->poke(address, value, flags);
   myLastPokeAddress = address;
 
@@ -243,7 +243,7 @@ bool M6502::execute(uInt32 number)
       // Reset the peek/poke address pointers
       myLastPeekAddress = myLastPokeAddress = myDataAddressForPoke = 0;
 
-      cycles = 0;
+      icycles = 0;
       // Fetch instruction at the program counter
       IR = peek(PC++, DISASM_CODE);  // This address represents a code section
 
diff --git a/src/emucore/M6502.hxx b/src/emucore/M6502.hxx
index 8a5a38dc3..16feb2459 100644
--- a/src/emucore/M6502.hxx
+++ b/src/emucore/M6502.hxx
@@ -348,7 +348,7 @@ class M6502 : public Serializable
     bool notZ;  // Z flag complement for processor status register
     bool C;     // C flag for processor status register
 
-    uInt8 cycles; // cycles of last instruction
+    uInt8 icycles; // cycles of last instruction
 
     /// Indicates the numer of distinct memory accesses
     uInt32 myNumberOfDistinctAccesses;
diff --git a/src/yacc/YaccParser.cxx b/src/yacc/YaccParser.cxx
index 891989d87..dc3f0f921 100644
--- a/src/yacc/YaccParser.cxx
+++ b/src/yacc/YaccParser.cxx
@@ -219,8 +219,8 @@ CpuMethod getCpuSpecial(char* ch)
     return &CpuDebug::i;
   else if(BSPF::equalsIgnoreCase(ch, "b"))
     return &CpuDebug::b;
-  else if(BSPF::equalsIgnoreCase(ch, "_cycles"))
-    return &CpuDebug::cycles;
+  else if(BSPF::equalsIgnoreCase(ch, "_icycles"))
+    return &CpuDebug::icycles;
   else
     return nullptr;
 }