diff --git a/src/coreclr/jit/emitxarch.cpp b/src/coreclr/jit/emitxarch.cpp
index cb83b0f7debbc..aaa94aaf08a31 100644
--- a/src/coreclr/jit/emitxarch.cpp
+++ b/src/coreclr/jit/emitxarch.cpp
@@ -4362,6 +4362,14 @@ void emitter::emitIns_C(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fld
     emitAdjustStackDepthPushPop(ins);
 }
 
+//------------------------------------------------------------------------
+// emitIns_A: Emit an instruction with one memory ("[address mode]") operand.
+//
+// Arguments:
+//    ins   - The instruction to emit
+//    attr  - The corresponding emit attribute
+//    indir - The memory operand, represented as an indirection tree
+//
 void emitter::emitIns_A(instruction ins, emitAttr attr, GenTreeIndir* indir)
 {
     ssize_t    offs = indir->Offset();