diff --git a/paddle/fluid/platform/cpu_helper.cc b/paddle/fluid/platform/cpu_helper.cc
index 6841652b7571f53451ae1d39411f734a27f6c5d0..234a04b5c2eb5ee643e8a4e723b28331cd8e6ee0 100644
--- a/paddle/fluid/platform/cpu_helper.cc
+++ b/paddle/fluid/platform/cpu_helper.cc
@@ -24,9 +24,6 @@ limitations under the License. */
 #include <cblas.h>
 #endif
 
-DEFINE_int32(paddle_num_threads, 1,
-             "Number of threads for each paddle instance.");
-
 namespace paddle {
 namespace platform {
 
diff --git a/paddle/fluid/platform/init.cc b/paddle/fluid/platform/init.cc
index 79a2ca96ed7fdcefe83a6251781502af1d3cb6f2..6f1f0c4796f3bae2fb419bf103cb6c0c5489bf65 100644
--- a/paddle/fluid/platform/init.cc
+++ b/paddle/fluid/platform/init.cc
@@ -23,7 +23,8 @@ limitations under the License. */
 #include "paddle/fluid/platform/place.h"
 #include "paddle/fluid/string/piece.h"
 
-DECLARE_int32(paddle_num_threads);
+DEFINE_int32(paddle_num_threads, 1,
+             "Number of threads for each paddle instance.");
 
 namespace paddle {
 namespace framework {