diff --git a/src/amd/compiler/aco_assembler.cpp b/src/amd/compiler/aco_assembler.cpp
index 69b8a9b33c6..a9dd6b441e2 100644
--- a/src/amd/compiler/aco_assembler.cpp
+++ b/src/amd/compiler/aco_assembler.cpp
@@ -154,15 +154,17 @@ void emit_instruction(asm_context& ctx, std::vector<uint32_t>& out, Instruction*
          encoding |= opcode << 22;
          encoding |= instr->definitions.size() ? instr->definitions[0].physReg() << 15 : 0;
          encoding |= instr->operands.size() ? (instr->operands[0].physReg() >> 1) << 9 : 0;
-         if (!instr->operands[1].isConstant() || instr->operands[1].constantValue() >= 1024) {
-            encoding |= instr->operands[1].physReg().reg;
-         } else {
-            encoding |= instr->operands[1].constantValue() >> 2;
-            encoding |= 1 << 8;
+         if (instr->operands.size() >= 2) {
+            if (!instr->operands[1].isConstant() || instr->operands[1].constantValue() >= 1024) {
+               encoding |= instr->operands[1].physReg().reg;
+            } else {
+               encoding |= instr->operands[1].constantValue() >> 2;
+               encoding |= 1 << 8;
+            }
          }
          out.push_back(encoding);
          /* SMRD instructions can take a literal on GFX6 & GFX7 */
-         if (instr->operands[1].isConstant() && instr->operands[1].constantValue() >= 1024)
+         if (instr->operands.size() >= 2 && instr->operands[1].isConstant() && instr->operands[1].constantValue() >= 1024)
             out.push_back(instr->operands[1].constantValue() >> 2);
          return;
       }