diff --git a/vvp/opcodes.txt b/vvp/opcodes.txt
index 117e5c83b..b6b6a4c90 100644
--- a/vvp/opcodes.txt
+++ b/vvp/opcodes.txt
@@ -342,9 +342,9 @@ bits 4/5/6 just line %ix/get.
 
 This instruction loads an immediate value into the addressed index
 register. The index register holds numeric values, so the <value> is a
-number. The idx value selects the index register, and may be 0, 1, 2
-or 3. This is different from %ix/get, which loads the index register
-from a value in the thread bit vector.
+number. The idx value selects the index register. This is different
+from %ix/get, which loads the index register from a value in the
+thread bit vector.
 
 
 * %ix/add <idx>, <value>
diff --git a/vvp/vthread.cc b/vvp/vthread.cc
index 4eca71f1c..d8bde41d0 100644
--- a/vvp/vthread.cc
+++ b/vvp/vthread.cc
@@ -1858,7 +1858,7 @@ bool of_IX_MUL(vthread_t thr, vvp_code_t cp)
 
 bool of_IX_LOAD(vthread_t thr, vvp_code_t cp)
 {
-      thr->words[cp->bit_idx[0] & 3].w_int = cp->number;
+      thr->words[cp->bit_idx[0]].w_int = cp->number;
       return true;
 }