diff --git a/reactos/lib/fast486/extraops.c b/reactos/lib/fast486/extraops.c
index 12670a46774..38dfc3f0018 100644
--- a/reactos/lib/fast486/extraops.c
+++ b/reactos/lib/fast486/extraops.c
@@ -37,8 +37,8 @@
 FAST486_OPCODE_HANDLER_PROC
 Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
 {
-    Fast486OpcodeGroup0F00,             /* 0x00 - 0x01 */
-    Fast486OpcodeGroup0F01,
+    Fast486ExtOpcodeGroup0F00,          /* 0x00 - 0x01 */
+    Fast486ExtOpcodeGroup0F01,
     Fast486ExtOpcodeLar,                /* 0x02 */
     Fast486ExtOpcodeLsl,                /* 0x03 */
     Fast486ExtOpcodeInvalid,            /* 0x04 - 0x05 */   // Invalid
@@ -222,8 +222,8 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
     Fast486ExtOpcodeMovzxByte,          /* 0xB6 - 0xB7 */
     Fast486ExtOpcodeMovzxWord,
     Fast486ExtOpcodeInvalid,            /* 0xB8 */          // Invalid
-    Fast486OpcodeGroup0FB9,             /* 0xB9 */
-    Fast486OpcodeGroup0FBA,             /* 0xBA */
+    Fast486ExtOpcodeGroup0FB9,          /* 0xB9 */
+    Fast486ExtOpcodeGroup0FBA,          /* 0xBA */
     Fast486ExtOpcodeBtc,                /* 0xBB */
     Fast486ExtOpcodeBsf,                /* 0xBC */
     Fast486ExtOpcodeBsr,                /* 0xBD */
diff --git a/reactos/lib/fast486/opgroups.c b/reactos/lib/fast486/opgroups.c
index 5ec066b8207..303fcd1958a 100644
--- a/reactos/lib/fast486/opgroups.c
+++ b/reactos/lib/fast486/opgroups.c
@@ -1703,7 +1703,8 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupFF)
     return TRUE;
 }
 
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F00)
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0F00)
 {
     FAST486_MOD_REG_RM ModRegRm;
     BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
@@ -2014,7 +2015,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F00)
     }
 }
 
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F01)
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0F01)
 {
     // FAST486_TABLE_REG TableReg;
     UCHAR TableReg[6];
@@ -2230,7 +2231,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F01)
     }
 }
 
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FB9)
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0FB9)
 {
     FAST486_MOD_REG_RM ModRegRm;
     BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;
@@ -2248,7 +2249,7 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FB9)
     return FALSE;
 }
 
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FBA)
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0FBA)
 {
     FAST486_MOD_REG_RM ModRegRm;
     BOOLEAN OperandSize, AddressSize;
diff --git a/reactos/lib/fast486/opgroups.h b/reactos/lib/fast486/opgroups.h
index f74877d34c0..38eed676af9 100644
--- a/reactos/lib/fast486/opgroups.h
+++ b/reactos/lib/fast486/opgroups.h
@@ -42,10 +42,11 @@ FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF6);
 FAST486_OPCODE_HANDLER(Fast486OpcodeGroupF7);
 FAST486_OPCODE_HANDLER(Fast486OpcodeGroupFE);
 FAST486_OPCODE_HANDLER(Fast486OpcodeGroupFF);
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F00);
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0F01);
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FB9);
-FAST486_OPCODE_HANDLER(Fast486OpcodeGroup0FBA);
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0F00);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0F01);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0FB9);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeGroup0FBA);
 
 #endif // _OPGROUPS_H_