diff --git a/Modules/Platform/HP-UX.cmake b/Modules/Platform/HP-UX.cmake
index 65cc7310d..df042cd22 100644
--- a/Modules/Platform/HP-UX.cmake
+++ b/Modules/Platform/HP-UX.cmake
@@ -1,9 +1,11 @@
 set(CMAKE_PLATFORM_REQUIRED_RUNTIME_PATH /usr/lib)
 
-set(CMAKE_SHARED_LIBRARY_SUFFIX ".sl")          # .so
+if(NOT CMAKE_SYSTEM_PROCESSOR STREQUAL "ia64")
+  set(CMAKE_SHARED_LIBRARY_SUFFIX ".sl")          # .so
+  set(CMAKE_FIND_LIBRARY_SUFFIXES ".sl" ".so" ".a")
+  set(CMAKE_EXTRA_SHARED_LIBRARY_SUFFIXES ".so")
+endif()
 set(CMAKE_DL_LIBS "dld")
-set(CMAKE_FIND_LIBRARY_SUFFIXES ".sl" ".so" ".a")
-set(CMAKE_EXTRA_SHARED_LIBRARY_SUFFIXES ".so")
 
 # The HP linker needs to find transitive shared library dependencies
 # in the -L path.  Therefore the runtime path must be added to the