Apache 2.0.54. openssl-0.9.7

I am receiving numerous errors while trying to compile Apache / Openssl
on CentOs4 (RHEL). Here is the error....any suggestions greatly
appreciated!

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s/include -I/root/httpd-2.0.54/modules/dav/main -prefer-non-pic -static
-c ssl_engine_pphrase.c && touch ssl_engine_pphrase.lo
ssl_engine_pphrase.c: In function `ssl_pphrase_Handle_CB':
ssl_engine_pphrase.c:684: error: `PEM_F_DEF_CALLBACK' undeclared (first
use in this function)
ssl_engine_pphrase.c:684: error: (Each undeclared identifier is
reported only once
ssl_engine_pphrase.c:684: error: for each function it appears in.)
make[3]: *** [ssl_engine_pphrase.lo] Error 1
make[3]: Leaving directory `/root/httpd-2.0.54/modules/ssl'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/root/httpd-2.0.54/modules/ssl'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/httpd-2.0.54/modules'
make: *** [all-recursive] Error 1

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Thanks!
Ralph