diff --git a/src/disasm.c b/src/disasm.c
index 8f4bd4e0..ccaa5a5a 100644
--- a/src/disasm.c
+++ b/src/disasm.c
@@ -265,7 +265,6 @@ int disasm_init(const AVRPART *p) {
    * 8 untreated opcodes and 20 "unofficial" ones
    *
    * OPCODE_lds_rc
-   * OPCODE_spm_zz
    * OPCODE_sts_rc
    *
    * OPCODE_x_bld
@@ -372,6 +371,7 @@ int disasm_init(const AVRPART *p) {
   Register_Opcode(ldz4_Callback, "10q0 qq0d  dddd 0qqq", OPCODE_ldd_2);
   Register_Opcode(ldi_Callback, "1110 KKKK  dddd KKKK", OPCODE_ldi);
   Register_Opcode(lds_Callback, "1001 000d  dddd 0000    kkkk kkkk  kkkk kkkk", OPCODE_lds);
+  Register_Opcode(lds_rc_Callback, "1010 0kkk  dddd kkkk", OPCODE_lds_rc);
   Register_Opcode(lpm1_Callback, "1001 0101  1100 1000", OPCODE_lpm_1);
   Register_Opcode(lpm2_Callback, "1001 000d  dddd 0100", OPCODE_lpm_2);
   Register_Opcode(lpm3_Callback, "1001 000d  dddd 0101", OPCODE_lpm_3);
diff --git a/src/disasm_callbacks_assembly.c b/src/disasm_callbacks_assembly.c
index 6e862956..a95c305b 100644
--- a/src/disasm_callbacks_assembly.c
+++ b/src/disasm_callbacks_assembly.c
@@ -565,6 +565,21 @@ CALLBACK(lds_Callback) {
   }
 }
 
+CALLBACK(lds_rc_Callback) {
+  const char *MemAddress;
+
+  /*
+   * ADDR[7:0] ← (/INST[8], INST[8], INST[10], INST[9], INST[3], INST[2], INST[1], INST[0])
+   * ADDR[7:0] ← (/k[4], k[4], k[6], k[5], k[3], k[2], k[1], k[0])
+   */
+  int addr = (Rk & 0xf) | ((Rk >> 1) & 0x30) | ((Rk & 0x10) << 2) | (((Rk & 0x10) ^ 0x10) << 3);
+
+  snprintf(cx->dis_code, 255, "%-7s r%d, 0x%02x", avr_opcodes[mnemo].opcode, Rd+16, addr);
+  MemAddress = Tagfile_Resolve_Mem_Address(addr);
+  if(MemAddress)
+    snprintf(cx->dis_comment, 255, "%s", MemAddress);
+}
+
 CALLBACK(lpm1_Callback) {
   Operation_Simple(mnemo);
 }
diff --git a/src/disasm_private.h b/src/disasm_private.h
index cf86894a..fe7d409b 100644
--- a/src/disasm_private.h
+++ b/src/disasm_private.h
@@ -134,6 +134,7 @@ void ldz3_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void ldz4_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void ldi_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void lds_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
+void lds_rc_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void lpm1_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void lpm2_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);
 void lpm3_Callback(const char *Bitstream, int Position, AVR_opcode mnemo);