--- a/configure.in
+++ b/configure.in
@@ -2195,17 +2195,17 @@ ia64*-hpux*)
         if test -n "$MOZ_PARALLEL_BUILD"; then
            dnl This argument has a max value of 8.
            if test $MOZ_PARALLEL_BUILD -gt 8; then
               cgthreads="-CGTHREADS8"
            else
               cgthreads="-CGTHREADS${MOZ_PARALLEL_BUILD}"
            fi
         fi
-        PROFILE_GEN_LDFLAGS="-LTCG:PGINSTRUMENT $cgthreads"
+        PROFILE_GEN_LDFLAGS="-LTCG:PGINSTRUMENT -PogoSafeMode $cgthreads"
         dnl XXX: PGO builds can fail with warnings treated as errors,
         dnl specifically "no profile data available" appears to be
         dnl treated as an error sometimes. This might be a consequence
         dnl of using WARNINGS_AS_ERRORS in some modules, combined
         dnl with the linker doing most of the work in the whole-program
         dnl optimization/PGO case. I think it's probably a compiler bug,
         dnl but we work around it here.
         PROFILE_USE_CFLAGS="-GL -wd4624 -wd4952"