diff --git a/src/system/kernel/fs/fd.cpp b/src/system/kernel/fs/fd.cpp
index 06b3b0cf04..4bc7bf9a53 100644
--- a/src/system/kernel/fs/fd.cpp
+++ b/src/system/kernel/fs/fd.cpp
@@ -12,7 +12,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <sys/ioctl.h>
 
 #include <OS.h>
 
@@ -516,17 +515,6 @@ fd_ioctl(bool kernelFD, int fd, uint32 op, void* buffer, size_t length)
 	if (descriptor == NULL)
 		return B_FILE_ERROR;
 
-	if (op == FIONBIO || op == FIONREAD) {
-		switch (descriptor->type) {
-			case FDTYPE_FILE:
-			case FDTYPE_DIR:
-			case FDTYPE_ATTR_DIR:
-			case FDTYPE_ATTR:
-				put_fd(descriptor);
-				return ENOTTY;
-		}
-	}	
-
 	if (descriptor->ops->fd_ioctl)
 		status = descriptor->ops->fd_ioctl(descriptor, op, buffer, length);
 	else