Index: uspace/lib/block/block.c
===================================================================
--- uspace/lib/block/block.c	(revision 38d150e6238ab44c861f6486e46454e07caeb0f0)
+++ uspace/lib/block/block.c	(revision c19a5a59bb6be5cf8da4e0c9a6a35d207103bc14)
@@ -52,4 +52,5 @@
 #include <stdio.h>
 #include <stacktrace.h>
+#include <str_error.h>
 #include <offset.h>
 #include <inttypes.h>
@@ -925,6 +926,6 @@
 	int rc = bd_read_blocks(devcon->bd, ba, cnt, buf, size);
 	if (rc != EOK) {
-		printf("Error %d reading %zu blocks starting at block %" PRIuOFF64
-		    " from device handle %" PRIun "\n", rc, cnt, ba,
+		printf("Error %s reading %zu blocks starting at block %" PRIuOFF64
+		    " from device handle %" PRIun "\n", str_error_name(rc), cnt, ba,
 		    devcon->service_id);
 #ifndef NDEBUG
@@ -952,6 +953,6 @@
 	int rc = bd_write_blocks(devcon->bd, ba, cnt, data, size);
 	if (rc != EOK) {
-		printf("Error %d writing %zu blocks starting at block %" PRIuOFF64
-		    " to device handle %" PRIun "\n", rc, cnt, ba, devcon->service_id);
+		printf("Error %s writing %zu blocks starting at block %" PRIuOFF64
+		    " to device handle %" PRIun "\n", str_error_name(rc), cnt, ba, devcon->service_id);
 #ifndef NDEBUG
 		stacktrace_print();