diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c
index f0f5c5c3de12..26cc6029b280 100644
--- a/lib/lz4/lz4_decompress.c
+++ b/lib/lz4/lz4_decompress.c
@@ -47,6 +47,11 @@
 
 #include "lz4defs.h"
 
+static const int dec32table[] = {0, 3, 2, 3, 0, 0, 0, 0};
+#if LZ4_ARCH64
+static const int dec64table[] = {0, 0, 0, -1, 0, 1, 2, 3};
+#endif
+
 static int lz4_uncompress(const char *source, char *dest, int osize)
 {
 	const BYTE *ip = (const BYTE *) source;
@@ -56,10 +61,6 @@ static int lz4_uncompress(const char *source, char *dest, int osize)
 	BYTE *cpy;
 	unsigned token;
 	size_t length;
-	size_t dec32table[] = {0, 3, 2, 3, 0, 0, 0, 0};
-#if LZ4_ARCH64
-	size_t dec64table[] = {0, 0, 0, -1, 0, 1, 2, 3};
-#endif
 
 	while (1) {
 
@@ -116,7 +117,7 @@ static int lz4_uncompress(const char *source, char *dest, int osize)
 		/* copy repeated sequence */
 		if (unlikely((op - ref) < STEPSIZE)) {
 #if LZ4_ARCH64
-			size_t dec64 = dec64table[op - ref];
+			int dec64 = dec64table[op - ref];
 #else
 			const int dec64 = 0;
 #endif
@@ -177,11 +178,6 @@ static int lz4_uncompress_unknownoutputsize(const char *source, char *dest,
 	BYTE * const oend = op + maxoutputsize;
 	BYTE *cpy;
 
-	size_t dec32table[] = {0, 3, 2, 3, 0, 0, 0, 0};
-#if LZ4_ARCH64
-	size_t dec64table[] = {0, 0, 0, -1, 0, 1, 2, 3};
-#endif
-
 	/* Main Loop */
 	while (ip < iend) {
 
@@ -249,7 +245,7 @@ static int lz4_uncompress_unknownoutputsize(const char *source, char *dest,
 		/* copy repeated sequence */
 		if (unlikely((op - ref) < STEPSIZE)) {
 #if LZ4_ARCH64
-			size_t dec64 = dec64table[op - ref];
+			int dec64 = dec64table[op - ref];
 #else
 			const int dec64 = 0;
 #endif