diff --git configure.ac configure.ac
index f9d110e..dc9fd8b 100644
--- configure.ac
+++ configure.ac
@@ -1131,7 +1131,7 @@ if test "x${enable_nss}" = "xyes" || test "x${enable_nss}" = "xstatic"; then
 				nsprlibs="$DL_LIB -lplc4 -lplds4 -lnspr4 $PTHREAD_LIB"
 			fi
 			
-			AC_CACHE_CHECK([for Mozilla nspr libraries], moz_nspr_libs,
+			AC_CACHE_CHECK([for Mozilla nspr libraries], ac_cv_moz_nspr_libs,
 			[
 		       		LIBS_save="$LIBS"
 				CFLAGS="$CFLAGS $MANUAL_NSPR_CFLAGS"
@@ -1144,12 +1144,12 @@ if test "x${enable_nss}" = "xyes" || test "x${enable_nss}" = "xstatic"; then
 		       			LDFLAGS="$LDFLAGS"
 				fi
 				
-				AC_TRY_LINK_FUNC(PR_Init, moz_nspr_libs="yes", moz_nspr_libs="no")
+				AC_TRY_LINK_FUNC(PR_Init, ac_cv_moz_nspr_libs="yes", ac_cv_moz_nspr_libs="no")
 				CFLAGS="$CFLAGS_save"
 				LDFLAGS="$LDFLAGS_save"
 	 			LIBS="$LIBS_save"
 			])
-			if test "x$moz_nspr_libs" != "xno"; then
+			if test "x$ac_cv_moz_nspr_libs" != "xno"; then
 				have_nspr_libs="yes"
 				MANUAL_NSPR_LIBS="-L$with_nspr_libs $nsprlibs"
 			else
@@ -1210,21 +1210,21 @@ if test "x${enable_nss}" = "xyes" || test "x${enable_nss}" = "xstatic"; then
 		 		nsslibs="-lssl3 -lsmime3 -lnss3"
 	 		fi	
 			
-			AC_CACHE_CHECK([for Mozilla nss libraries], moz_nss_libs,
+			AC_CACHE_CHECK([for Mozilla nss libraries], ac_cv_moz_nss_libs,
 			[
 	 			LIBS_save="$LIBS"
 				LDFLAGS="$LDFLAGS -L$with_nspr_libs $nsprlibs -L$with_nss_libs $nsslibs"
 		      		LIBS="$nsslibs $nsprlibs"
-				AC_TRY_LINK_FUNC(NSS_Init, moz_nss_libs="yes", moz_nss_libs="no")
-				if test "$moz_nss_libs" = no; then
+				AC_TRY_LINK_FUNC(NSS_Init, ac_cv_moz_nss_libs="yes", ac_cv_moz_nss_libs="no")
+				if test "$ac_cv_moz_nss_libs" = no; then
 					nsslibs="-lssl3 -lsmime3 -lnss3"
 					LDFLAGS="$LDFLAGS -L$with_nspr_libs $nsprlibs -L$with_nss_libs $nsslibs"
-					AC_TRY_LINK_FUNC(NSS_Init, moz_nss_libs="yes", moz_nss_libs="no")	
+					AC_TRY_LINK_FUNC(NSS_Init, ac_cv_moz_nss_libs="yes", ac_cv_moz_nss_libs="no")	
 				fi
 				LDFLAGS="$LDFLAGS_save"
 	 			LIBS="$LIBS_save"
 			])
-			if test "$moz_nss_libs" != no; then
+			if test "$ac_cv_moz_nss_libs" != no; then
 				AC_DEFINE(HAVE_NSS)
 				AC_DEFINE(HAVE_SSL)
 				AC_DEFINE_UNQUOTED(MOZILLA_NSS_LIB_DIR,"$with_nss_libs", [Define to the full path of mozilla nss library])