diff --git a/include/BIOS/func/ext_read.nasm b/include/BIOS/func/ext_read.nasm
index 2d4b0b1..d084615 100644
--- a/include/BIOS/func/ext_read.nasm
+++ b/include/BIOS/func/ext_read.nasm
@@ -51,7 +51,7 @@ endstruc
 ;                         uint32_t lba,
 ;                         uint16_t count, uint8_t drive_num)
 ALIGN 4, db 0x90
-read_disk_raw:
+BIOS_int13h_ext_read:
     __CDECL16_PROC_ENTRY
 .func:                         
     push LBAPkt_t_size        ; len
diff --git a/src/mbr/mbr.nasm b/src/mbr/mbr.nasm
index d3d4076..223c1be 100755
--- a/src/mbr/mbr.nasm
+++ b/src/mbr/mbr.nasm
@@ -133,7 +133,7 @@ main:
         ; uint8_t read_stage2_raw(uint16_t buf_segment, uint16_t buf_offset, 
         ;                         uint32_t lba,
         ;                         uint16_t count, uint16_t drive_num)
-        call read_disk_raw
+        call BIOS_int13h_ext_read
         add sp, 0xC
     .goto_vbr:
         cmp word [VBR_ENTRY + 0x1FE], 0xAA55
diff --git a/src/stage2/stage2.nasm b/src/stage2/stage2.nasm
index c2092c5..438b4dd 100755
--- a/src/stage2/stage2.nasm
+++ b/src/stage2/stage2.nasm
@@ -208,7 +208,7 @@ ReadMbrData:
 
     push word [bp + 6]                      ; offset = dst
     push __STAGE2_SEGMENT                   ; this segment 
-    call read_disk_raw
+    call BIOS_int13h_ext_read
     add sp, 0xC
 .check_sig:
     mov bx, [bp + 6]
@@ -250,7 +250,7 @@ ReadVbrData:
 
     push word [bp + 6]                      ; offset = dst
     push __STAGE2_SEGMENT                   ; this segment 
-    call read_disk_raw
+    call BIOS_int13h_ext_read
     add sp, 0xC
     ; vbr (with fat bpb/ebpb) is at the buffer now
 .check_sig:
diff --git a/src/vbr/vbr.nasm b/src/vbr/vbr.nasm
index c53c4ea..f2ca0b8 100755
--- a/src/vbr/vbr.nasm
+++ b/src/vbr/vbr.nasm
@@ -114,7 +114,7 @@ main:
     ; uint8_t read_stage2_raw(uint16_t buf_segment, uint16_t buf_offset, 
     ;                         uint32_t lba,
     ;                         uint16_t count, uint16_t drive_num)
-    call read_disk_raw
+    call BIOS_int13h_ext_read
     add sp, 0xC
 .enter_stage2:
     mov dl, byte [bp - 2]                ; byte boot_drive