diff --git a/src/ibm.h b/src/ibm.h
index 0e95a3f30..ef2896d8f 100644
--- a/src/ibm.h
+++ b/src/ibm.h
@@ -416,7 +416,7 @@ enum
         ROM_MRTHOR,	/*Intel Advanced/ATX / 430FX / MR.BIOS / National Semiconductors PC87306*/
         ROM_POWERMATE_V,/*NEC PowerMate V / 430FX / Phoenix BIOS / SMC FDC37C665*/
 
-        ROM_IBMPS1_2121,/*IBM PS/1 Model 2121 with ISA expansion bus*/
+        ROM_IBMPS1_2121_ISA,/*IBM PS/1 Model 2121 with ISA expansion bus*/
 	
         ROM_MAX
 };