diff --git a/src/ltm/tommath.h b/src/ltm/tommath.h
index 4f4289e..f8051a2 100644
--- a/src/ltm/tommath.h
+++ b/src/ltm/tommath.h
@@ -35,7 +35,7 @@
     defined(__ia64) || defined(__ia64__) || defined(__itanium__) || defined(_M_IA64) || \
     defined(__LP64__) || defined(_LP64) || defined(__64BIT__)
 #   if !(defined(MP_32BIT) || defined(MP_16BIT) || defined(MP_8BIT))
-#      if defined(__GNUC__)
+#      if defined(__GNUC__) && !defined(__hppa)
 /* we support 128bit integers only via: __attribute__((mode(TI))) */
 #         define MP_64BIT
 #      else