diff --git a/src/tests/kernel/boot/loader/Handle.cpp b/src/tests/kernel/boot/loader/Handle.cpp
index b027c4a2b1..d3487de075 100644
--- a/src/tests/kernel/boot/loader/Handle.cpp
+++ b/src/tests/kernel/boot/loader/Handle.cpp
@@ -13,6 +13,12 @@
 #include <unistd.h>
 
 
+#ifndef HAVE_READ_POS
+#	define read_pos(fd, pos, buffer, size) pread(fd, buffer, size, pos)
+#	define write_pos(fd, pos, buffer, size) pwrite(fd, buffer, size, pos)
+#endif
+
+
 Handle::Handle(int handle, bool takeOwnership)
 	:
 	fHandle(handle),
@@ -49,14 +55,14 @@ Handle::SetHandle(int handle, bool takeOwnership)
 ssize_t
 Handle::ReadAt(void *cookie, off_t pos, void *buffer, size_t bufferSize)
 {
-	return pread(fHandle, buffer, bufferSize, pos);
+	return read_pos(fHandle, pos, buffer, bufferSize);
 }
 
 
 ssize_t
 Handle::WriteAt(void *cookie, off_t pos, const void *buffer, size_t bufferSize)
 {
-	return pwrite(fHandle, buffer, bufferSize, pos);
+	return write_pos(fHandle, pos, buffer, bufferSize);
 }
 
 
diff --git a/src/tests/kernel/boot/loader/Jamfile b/src/tests/kernel/boot/loader/Jamfile
index e631f18760..992d63d7bb 100644
--- a/src/tests/kernel/boot/loader/Jamfile
+++ b/src/tests/kernel/boot/loader/Jamfile
@@ -23,7 +23,8 @@ ObjectDefines
 if $(OS) = "LINUX" {
 #	SubDirC++Flags -include /usr/include/stdio.h ;
 } else {
-	SubDirC++Flags -include /boot/develop/headers/posix/stdio.h ;
+#	SubDirC++Flags -include /boot/develop/headers/posix/stdio.h ;
+	SubDirC++Flags -DHAVE_READ_POS=1 ;
 }
 
 SimpleTest BootLoaderTest :