diff --git a/util/pl/Mingw32.pl b/util/pl/Mingw32.pl
index 043a3a53ee..d0472df278 100644
--- a/util/pl/Mingw32.pl
+++ b/util/pl/Mingw32.pl
@@ -43,7 +43,7 @@ if ($gaswin and !$no_asm)
         $rmd160_asm_src='crypto/ripemd/asm/rm-win32.s';
         $sha1_asm_obj='$(OBJ_D)\s1-win32.o';
         $sha1_asm_src='crypto/sha/asm/s1-win32.s';
-	$cflags.=" -DBN_ASM -DMD5_ASM -DSHA1_ASM";
+	$cflags.=" -DBN_ASM -DMD5_ASM -DSHA1_ASM -DOPENSSL_BN_ASM_PART_WORDS";
 	}
 
 
diff --git a/util/pl/linux.pl b/util/pl/linux.pl
index 8924ed5480..d24f7b7291 100644
--- a/util/pl/linux.pl
+++ b/util/pl/linux.pl
@@ -39,7 +39,7 @@ if (!$no_asm)
 	$rmd160_asm_src='crypto/ripemd/asm/rm86unix.cpp';
 	$sha1_asm_obj='$(OBJ_D)/sx86-elf.o';
 	$sha1_asm_src='crypto/sha/asm/sx86unix.cpp';
-	$cflags.=" -DBN_ASM -DMD5_ASM -DSHA1_ASM";
+	$cflags.=" -DBN_ASM -DMD5_ASM -DSHA1_ASM -DOPENSSL_BN_ASM_PART_WORDS";
 	}
 
 $cflags.=" -DTERMIO -DL_ENDIAN -m486 -Wall";