diff --git a/crypto/sha/asm/sha512-x86_64.pl b/crypto/sha/asm/sha512-x86_64.pl
index 0c1285f0..bde067be 100644
--- a/crypto/sha/asm/sha512-x86_64.pl
+++ b/crypto/sha/asm/sha512-x86_64.pl
@@ -646,7 +646,7 @@ $code.=<<___;
 
 .align	16
 .Lssse3_00_47:
-	sub	\$-16*2*$SZ,$Tbl	# size optimization
+	sub	\$`-16*2*$SZ`,$Tbl	# size optimization
 ___
 sub Xupdate_256_SSSE3 () {
 	(
@@ -992,7 +992,7 @@ $code.=<<___;
 
 .align	16
 .Lxop_00_47:
-	sub	\$-16*2*$SZ,$Tbl	# size optimization
+	sub	\$`-16*2*$SZ`,$Tbl	# size optimization
 ___
 sub XOP_256_00_47 () {
 my $j = shift;
@@ -1154,7 +1154,7 @@ $code.=<<___;
 
 .align	16
 .Lxop_00_47:
-	add	\$16*2*$SZ,$Tbl
+	add	\$`16*2*$SZ`,$Tbl
 ___
 sub XOP_512_00_47 () {
 my $j = shift;
@@ -1370,7 +1370,7 @@ $code.=<<___;
 
 .align	16
 .Lavx_00_47:
-	sub	\$-16*2*$SZ,$Tbl	# size optimization
+	sub	\$`-16*2*$SZ`,$Tbl	# size optimization
 ___
 sub Xupdate_256_AVX () {
 	(
@@ -1484,7 +1484,7 @@ $code.=<<___;
 
 .align	16
 .Lavx_00_47:
-	add	\$16*2*$SZ,$Tbl
+	add	\$`16*2*$SZ`,$Tbl
 ___
 sub Xupdate_512_AVX () {
 	(