diff --git a/libs/math/src/tr1/copysign.cpp b/libs/math/src/tr1/copysign.cpp
index 0b8a744..760dec1 100644
--- a/libs/math/src/tr1/copysign.cpp
+++ b/libs/math/src/tr1/copysign.cpp
@@ -11,7 +11,7 @@
 #include <boost/math/special_functions/sign.hpp>
 #include "c_policy.hpp"
 
-#if !(defined(__HP_aCC) && (__HP_aCC >= 61400))
+#if !(defined(__HP_aCC) && (__HP_aCC >= 61000))
 
 extern "C" double BOOST_MATH_TR1_DECL copysign BOOST_PREVENT_MACRO_SUBSTITUTION(double x, double y)
 {
diff --git a/libs/math/src/tr1/copysignf.cpp b/libs/math/src/tr1/copysignf.cpp
index a310d2c..cf17edc 100644
--- a/libs/math/src/tr1/copysignf.cpp
+++ b/libs/math/src/tr1/copysignf.cpp
@@ -11,7 +11,7 @@
 #include <boost/math/special_functions/sign.hpp>
 #include "c_policy.hpp"
 
-#if !(defined(__HP_aCC) && (__HP_aCC >= 61400))
+#if !(defined(__HP_aCC) && (__HP_aCC >= 61000))
 
 extern "C" float BOOST_MATH_TR1_DECL copysignf BOOST_PREVENT_MACRO_SUBSTITUTION(float x, float y)
 {
diff --git a/libs/math/src/tr1/fmaxf.cpp b/libs/math/src/tr1/fmaxf.cpp
index f25a2ca..e7b180b 100644
--- a/libs/math/src/tr1/fmaxf.cpp
+++ b/libs/math/src/tr1/fmaxf.cpp
@@ -11,7 +11,7 @@
 #include <boost/math/special_functions/fpclassify.hpp>
 #include "c_policy.hpp"
 
-#if !(defined(__HP_aCC) && (__HP_aCC >= 61400))
+#if !(defined(__HP_aCC) && (__HP_aCC >= 61000))
 
 extern "C" float BOOST_MATH_TR1_DECL fmaxf BOOST_PREVENT_MACRO_SUBSTITUTION(float x, float y)
 {
diff --git a/libs/math/src/tr1/fminf.cpp b/libs/math/src/tr1/fminf.cpp
index 28c1552..d1bfb13 100644
--- a/libs/math/src/tr1/fminf.cpp
+++ b/libs/math/src/tr1/fminf.cpp
@@ -11,7 +11,7 @@
 #include <boost/math/special_functions/fpclassify.hpp>
 #include "c_policy.hpp"
 
-#if !(defined(__HP_aCC) && (__HP_aCC >= 61400))
+#if !(defined(__HP_aCC) && (__HP_aCC >= 61000))
 
 extern "C" float BOOST_MATH_TR1_DECL fminf BOOST_PREVENT_MACRO_SUBSTITUTION(float x, float y)
 {
-- 
1.6.4.2