diff --git a/src/superscalar.cpp b/src/superscalar.cpp
index a3130cb..012ff15 100644
--- a/src/superscalar.cpp
+++ b/src/superscalar.cpp
@@ -679,7 +679,7 @@ namespace randomx {
 
 				//if we have issued all macro-ops for the current RandomX instruction, create a new instruction
 				if (macroOpIndex >= currentInstruction.getInfo().getSize()) {
-					if (portsSaturated)
+					if (portsSaturated || programSize >= RANDOMX_SUPERSCALAR_MAX_SIZE)
 						break;
 					//select an instruction so that the first macro-op fits into the current slot
 					currentInstruction.createForSlot(gen, decodeBuffer->getCounts()[bufferIndex], decodeBuffer->getIndex(), decodeBuffer->getSize() == bufferIndex + 1, bufferIndex == 0);