diff --git a/configure.cmake b/configure.cmake
index 1f3d8e2..9e45f48 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -456,7 +456,11 @@ IF(NOT HAVE_FCNTL_NONBLOCK)
 ENDIF()
 
 IF(NOT CMAKE_CROSSCOMPILING AND NOT MSVC)
-  STRING(TOLOWER ${CMAKE_SYSTEM_PROCESSOR}  processor)
+  IF(${CMAKE_SYSTEM_PROCESSOR})
+    STRING(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} processor)
+  ELSE()
+    STRING(TOLOWER ${CMAKE_HOST_SYSTEM_PROCESSOR} processor)
+  ENDIF()
   IF(processor MATCHES "86" OR processor MATCHES "amd64" OR processor MATCHES "x64")
     IF(NOT CMAKE_SYSTEM_NAME MATCHES "SunOS")
       # The loader in some Solaris versions has a bug due to which it refuses to