diff --git a/src/liblzma/check/crc32_table.c b/src/liblzma/check/crc32_table.c
index 368874eb..b11762ae 100644
--- a/src/liblzma/check/crc32_table.c
+++ b/src/liblzma/check/crc32_table.c
@@ -12,6 +12,9 @@
 
 #include "common.h"
 
+// Having the declaration here silences clang -Wmissing-variable-declarations.
+extern const uint32_t lzma_crc32_table[8][256];
+
 #ifdef WORDS_BIGENDIAN
 #	include "crc32_table_be.h"
 #else
diff --git a/src/liblzma/check/crc64_table.c b/src/liblzma/check/crc64_table.c
index 1fbcd947..7560eb0a 100644
--- a/src/liblzma/check/crc64_table.c
+++ b/src/liblzma/check/crc64_table.c
@@ -12,6 +12,9 @@
 
 #include "common.h"
 
+// Having the declaration here silences clang -Wmissing-variable-declarations.
+extern const uint64_t lzma_crc64_table[4][256];
+
 #ifdef WORDS_BIGENDIAN
 #	include "crc64_table_be.h"
 #else