diff --git a/gobuffer.c b/gobuffer.c
index f8d2066..1ea823b 100644
--- a/gobuffer.c
+++ b/gobuffer.c
@@ -91,7 +91,12 @@ int gobuffer__add(struct gobuffer *gb, const void *s, unsigned int len)
 
 void gobuffer__copy(const struct gobuffer *gb, void *dest)
 {
-	memcpy(dest, gb->entries, gobuffer__size(gb));
+        if (gb->entries) {
+		memcpy(dest, gb->entries, gobuffer__size(gb));
+	} else {
+		/* gobuffer__size will be 0 or 1. */
+		memcpy(dest, "", gobuffer__size(gb));
+	}
 }
 
 const void *gobuffer__compress(struct gobuffer *gb, unsigned int *size)
@@ -101,7 +106,7 @@ const void *gobuffer__compress(struct gobuffer *gb, unsigned int *size)
 		.zfree	  = Z_NULL,
 		.opaque	  = Z_NULL,
 		.avail_in = gobuffer__size(gb),
-		.next_in  = (Bytef *)gobuffer__entries(gb),
+		.next_in  = (Bytef *)(gobuffer__entries(gb) ? : ""),
 	};
 	void *bf = NULL;
 	unsigned int bf_size = 0;