diff --git a/toolbox/swapoff.c b/toolbox/swapoff.c
index d8f6a00..477494e 100644
--- a/toolbox/swapoff.c
+++ b/toolbox/swapoff.c
@@ -13,7 +13,7 @@
 
     err = swapoff(argv[1]);
     if (err) {
-        fprintf(stderr, "swapoff failed for %s\n", argv[1]);
+        fprintf(stderr, "swapoff failed for %s: %s\n", argv[1], strerror(errno));
     }
 
     return err;
diff --git a/toolbox/swapon.c b/toolbox/swapon.c
index 21d2287..c060104 100644
--- a/toolbox/swapon.c
+++ b/toolbox/swapon.c
@@ -59,7 +59,7 @@
 
     err = swapon(argv[argc - 1], flags);
     if (err) {
-        fprintf(stderr, "swapon failed for %s\n", argv[argc - 1]);
+        fprintf(stderr, "swapon failed for %s: %s\n", argv[argc - 1], strerror(errno));
     }
 
     return err;