diff --git a/src/array.c b/src/array.c
index 8484ecd..5c1763e 100644
--- a/src/array.c
+++ b/src/array.c
@@ -50,6 +50,18 @@ array_reverse_bits (unsigned char data[], unsigned int size)
 }
 
 
+int
+array_isequal (const unsigned char data[], unsigned int size, unsigned char value)
+{
+	for (unsigned int i = 0; i < size; ++i) {
+		if (data[i] != value)
+			return 0;
+	}
+
+	return 1;
+}
+
+
 unsigned int
 array_uint32_be (const unsigned char data[])
 {
diff --git a/src/array.h b/src/array.h
index cc53dc2..2739e70 100644
--- a/src/array.h
+++ b/src/array.h
@@ -32,6 +32,9 @@ array_reverse_bytes (unsigned char data[], unsigned int size);
 void
 array_reverse_bits (unsigned char data[], unsigned int size);
 
+int
+array_isequal (const unsigned char data[], unsigned int size, unsigned char value);
+
 unsigned int
 array_uint32_be (const unsigned char data[]);
 
diff --git a/src/oceanic_common.c b/src/oceanic_common.c
index 0d17f64..2307bee 100644
--- a/src/oceanic_common.c
+++ b/src/oceanic_common.c
@@ -306,6 +306,17 @@ oceanic_common_device_foreach (oceanic_common_device_t *device, const oceanic_co
 			// Move to the start of the current entry.
 			current -= PAGESIZE / 2;
 
+			// Check for uninitialized entries. Normally, such entries are
+			// never present, except when the ringbuffer is actually empty,
+			// but the ringbuffer pointers are not set to their empty values.
+			// This appears to happen on some devices, and we attempt to
+			// fix this here.
+			if (array_isequal (logbooks + current, PAGESIZE / 2, 0xFF)) {
+				begin = current + PAGESIZE / 2;
+				abort = 1;
+				break;
+			}
+
 			// Compare the fingerprint to identify previously downloaded entries.
 			if (memcmp (logbooks + current, device->fingerprint, PAGESIZE / 2) == 0) {
 				begin = current + PAGESIZE / 2;