diff --git a/include/cdio/mmc.h b/include/cdio/mmc.h
index d20c1f44..04835956 100644
--- a/include/cdio/mmc.h
+++ b/include/cdio/mmc.h
@@ -35,6 +35,52 @@
 extern "C" {
 #endif /* __cplusplus */
 
+   /**
+      Structure of a SCSI/MMC sense reply.
+     
+      This has been adapted from GNU/Linux request_sense of <linux/cdrom.h>
+      include this for direct MMC access.
+      See SCSI Primary Commands-2 (SPC-2) table 102 or
+      SPC 4.5.3, Table 26.
+    */
+    struct mmc_request_sense {
+#if defined(WORDS_BIGENDIAN)
+	uint8_t valid		: 1;  /**< valid bit is 1 if info is valid */
+	uint8_t error_code	: 7;
+#else
+	uint8_t error_code	: 7;
+	uint8_t valid		: 1;  /**< valid bit is 1 if info is valid */
+#endif
+	uint8_t segment_number;
+#if defined(WORDS_BIGENDIAN)
+	uint8_t filemark	: 1; /**< manditory in sequential
+                                      * access devices */
+	uint8_t eom	        : 1; /**< end of medium. manditory in
+                                      * sequential access and
+                                      * printer devices */
+	uint8_t ili		: 1; /**< incorrect length indicator */
+	uint8_t reserved1	: 1;
+	uint8_t sense_key	: 4;
+#else
+	uint8_t sense_key	: 4;
+	uint8_t reserved1	: 1;
+	uint8_t ili		: 1; /**< incorrect length indicator */
+	uint8_t eom	        : 1; /**< end of medium. manditory in
+                                      * sequential access and
+                                      * printer devices */
+	uint8_t filemark	: 1; /**< manditory in sequential
+                                      * access devices */
+#endif
+	uint8_t information[4];
+	uint8_t additional_sense_len; /**< Additional sense length (n-7) */
+	uint8_t command_info[4];      /**< Command-specific information */
+	uint8_t asc;                  /**< Additional sense code */
+	uint8_t ascq;                 /**< Additional sense code qualifier */
+	uint8_t fruc;                 /**< Field replaceable unit code */
+	uint8_t sks[3];               /**< Sense-key specific */
+	uint8_t asb[46];              /**< Additional sense bytes */
+    };
+
   /**
       Set this to the maximum value in milliseconds that we will
       wait on an MMC command.  
diff --git a/include/cdio/types.h b/include/cdio/types.h
index 347bf5a7..4bc946e9 100644
--- a/include/cdio/types.h
+++ b/include/cdio/types.h
@@ -1,6 +1,4 @@
 /*
-    $Id: types.h,v 1.37 2008/03/25 15:59:09 karl Exp $
-
     Copyright (C) 2002, 2003, 2004, 2005, 2006, 2008
                   Rocky Bernstein <rocky@gnu.org>
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
diff --git a/lib/driver/gnu_linux.c b/lib/driver/gnu_linux.c
index 3ce9e197..32d3e11a 100644
--- a/lib/driver/gnu_linux.c
+++ b/lib/driver/gnu_linux.c
@@ -1250,7 +1250,7 @@ run_mmc_cmd_linux(void *p_user_data,
 {
   _img_private_t *p_env = p_user_data;
   struct cdrom_generic_command cgc;
-  struct request_sense sense;
+  struct mmc_request_sense sense;
   unsigned char *u_sense = (unsigned char *) &sense;
 
   p_env->gen.scsi_mmc_sense_valid = 0;
@@ -1258,7 +1258,7 @@ run_mmc_cmd_linux(void *p_user_data,
   memcpy(&cgc.cmd, p_cdb, i_cdb);
   cgc.buflen = i_buf;
   cgc.buffer = p_buf;
-  cgc.sense  = &sense;
+  cgc.sense  = (struct request_sense *) &sense;
 
   cgc.data_direction = (SCSI_MMC_DATA_READ  == e_direction) ? CGC_DATA_READ  :
                        (SCSI_MMC_DATA_WRITE == e_direction) ? CGC_DATA_WRITE :
@@ -1274,14 +1274,15 @@ run_mmc_cmd_linux(void *p_user_data,
 
     /* Record SCSI sense reply for API call mmc_last_cmd_sense(). 
     */
-    if (u_sense[7]) {
-      int sense_size = u_sense[7] + 8; /* SPC 4.5.3, Table 26: 
-                                          252 bytes legal, 263 bytes
-                                          possible */
-      if (sense_size > sizeof(sense))
-        sense_size = sizeof(sense);
-      memcpy((void *) p_env->gen.scsi_mmc_sense, &sense, sense_size);
-      p_env->gen.scsi_mmc_sense_valid = sense_size;
+    if (sense.additional_sense_len) {
+        /* SCSI Primary Command standard 
+           SPC 4.5.3, Table 26: 252 bytes legal, 263 bytes possible */
+        int sense_size = sense.additional_sense_len + 8; 
+    
+        if (sense_size > sizeof(sense))
+            sense_size = sizeof(sense);
+        memcpy((void *) p_env->gen.scsi_mmc_sense, &sense, sense_size);
+        p_env->gen.scsi_mmc_sense_valid = sense_size;
     }
 
     if (0 == i_rc) return DRIVER_OP_SUCCESS;