diff --git a/Configure b/Configure
index 5a46712da81620b892b4e6ac88acb95ff352184e..ef9c79f40d7302333dd0d8bb36acb9200933ff11 100755
--- a/Configure
+++ b/Configure
@@ -270,7 +270,7 @@ my %table=(
 "debug-linux-elf","gcc:-DREF_CHECK -DBN_CTX_DEBUG -DCRYPTO_MDEBUG -DL_ENDIAN -DTERMIO -g -m486 -Wall::-D_REENTRANT:-lefence:BN_LLONG $x86_gcc_des $x86_gcc_opts:$x86_elf_asm",
 "linux-aout",	"gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -m486 -Wall::(unknown)::BN_LLONG $x86_gcc_des $x86_gcc_opts:$x86_out_asm",
 "linux-mips",   "gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::(unknown)::BN_LLONG:::",
-"linux-ppc",    "gcc:-DB_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::(unknown)::::",
+"linux-ppc",    "gcc:-DB_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT::::",
 "NetBSD-sparc",	"gcc:-DTERMIOS -O3 -fomit-frame-pointer -mv8 -Wall -DB_ENDIAN::(unknown)::BN_LLONG MD2_CHAR RC4_INDEX DES_UNROLL:::",
 "NetBSD-m68",	"gcc:-DTERMIOS -O3 -fomit-frame-pointer -Wall -DB_ENDIAN::(unknown)::BN_LLONG MD2_CHAR RC4_INDEX DES_UNROLL:::",
 "NetBSD-x86",	"gcc:-DTERMIOS -O3 -fomit-frame-pointer -m486 -Wall::(unknown)::BN_LLONG $x86_gcc_des $x86_gcc_opts:",
diff --git a/TABLE b/TABLE
index fcde1881030869314a5a545e31ac643b2366f6be..be63c98d5fd408c10fc49fb078faccaa1113603a 100644
--- a/TABLE
+++ b/TABLE
@@ -1313,7 +1313,7 @@ $rc5_obj      =
 $cc           = gcc
 $cflags       = -DB_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall
 $unistd       = 
-$thread_cflag = (unknown)
+$thread_cflag = -D_REENTRANT
 $lflags       = 
 $bn_ops       = 
 $bn_obj       =