diff --git a/util.c b/util.c
index 5855c10..cfe9755 100644
--- a/util.c
+++ b/util.c
@@ -694,7 +694,8 @@
 				return 0;
 			}
 			/* But if not started, we had a bogus address. */
-			perror("ptrace: umoven");
+			if (addr != 0 && errno != EIO)
+				perror("ptrace: umoven");
 			return -1;
 		}
 		started = 1;
@@ -709,7 +710,7 @@
 				/* Ran into 'end of memory' - stupid "printpath" */
 				return 0;
 			}
-			if (addr != 0)
+			if (addr != 0 && errno != EIO)
 				perror("ptrace: umoven");
 			return -1;
 		}
@@ -844,7 +845,8 @@
 				/* Ran into 'end of memory' - stupid "printpath" */
 				return 0;
 			}
-			perror("umovestr");
+			if (addr != 0 && errno != EIO)
+				perror("umovestr");
 			return -1;
 		}
 		started = 1;
@@ -862,7 +864,8 @@
 				/* Ran into 'end of memory' - stupid "printpath" */
 				return 0;
 			}
-			perror("umovestr");
+			if (addr != 0 && errno != EIO)
+				perror("umovestr");
 			return -1;
 		}
 		started = 1;