diff --git a/src/bin/pg_dump/pg_backup_archiver.c b/src/bin/pg_dump/pg_backup_archiver.c
index 9390a6b837..8ffd8f7cad 100644
--- a/src/bin/pg_dump/pg_backup_archiver.c
+++ b/src/bin/pg_dump/pg_backup_archiver.c
@@ -3475,17 +3475,7 @@ WriteHead(ArchiveHandle *AH)
 	(*AH->WriteBytePtr) (AH, AH->intSize);
 	(*AH->WriteBytePtr) (AH, AH->offSize);
 	(*AH->WriteBytePtr) (AH, AH->format);
-
-#ifndef HAVE_LIBZ
-	if (AH->compression != 0)
-		write_msg(modulename, "WARNING: requested compression not available in this "
-				  "installation -- archive will be uncompressed\n");
-
-	AH->compression = 0;
-#endif
-
 	WriteInt(AH, AH->compression);
-
 	crtm = *localtime(&AH->createDate);
 	WriteInt(AH, crtm.tm_sec);
 	WriteInt(AH, crtm.tm_min);
diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c
index 2848fa995f..a958225f1f 100644
--- a/src/bin/pg_dump/pg_dump.c
+++ b/src/bin/pg_dump/pg_dump.c
@@ -589,12 +589,21 @@ main(int argc, char **argv)
 	/* Custom and directory formats are compressed by default, others not */
 	if (compressLevel == -1)
 	{
+#ifdef HAVE_LIBZ
 		if (archiveFormat == archCustom || archiveFormat == archDirectory)
 			compressLevel = Z_DEFAULT_COMPRESSION;
 		else
+#endif
 			compressLevel = 0;
 	}
 
+#ifndef HAVE_LIBZ
+	if (compressLevel != 0)
+		write_msg(NULL, "WARNING: requested compression not available in this "
+				  "installation -- archive will be uncompressed\n");
+	compressLevel = 0;
+#endif
+
 	/*
 	 * On Windows we can only have at most MAXIMUM_WAIT_OBJECTS (= 64 usually)
 	 * parallel jobs because that's the maximum limit for the