diff --git a/include/tim/vx/ops/maxpoolgrad.h b/include/tim/vx/ops/maxpoolgrad.h
index a07895d..361a38a 100644
--- a/include/tim/vx/ops/maxpoolgrad.h
+++ b/include/tim/vx/ops/maxpoolgrad.h
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 
 #ifndef TIM_VX_OPS_MAXPOOLGRAD_H_
 #define TIM_VX_OPS_MAXPOOLGRAD_H_
diff --git a/include/tim/vx/ops/maxpoolwithargmax2.h b/include/tim/vx/ops/maxpoolwithargmax2.h
index 4a7bd98..54e6b8c 100644
--- a/include/tim/vx/ops/maxpoolwithargmax2.h
+++ b/include/tim/vx/ops/maxpoolwithargmax2.h
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 #ifndef TIM_VX_OPS_MAXPOOLWITHARGMAX2_H_
 #define TIM_VX_OPS_MAXPOOLWITHARGMAX2_H_
 
diff --git a/src/tim/vx/ops/maxpoolgrad.cc b/src/tim/vx/ops/maxpoolgrad.cc
index c514964..dece28e 100644
--- a/src/tim/vx/ops/maxpoolgrad.cc
+++ b/src/tim/vx/ops/maxpoolgrad.cc
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 #include "tim/vx/ops.h"
 #include "vsi_nn_pub.h"
 #include "op_impl.h"
diff --git a/src/tim/vx/ops/maxpoolgrad_test.cc b/src/tim/vx/ops/maxpoolgrad_test.cc
index dddecac..ccbe81d 100644
--- a/src/tim/vx/ops/maxpoolgrad_test.cc
+++ b/src/tim/vx/ops/maxpoolgrad_test.cc
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 #include "tim/vx/context.h"
 #include "tim/vx/graph.h"
 #include "tim/vx/ops/maxpoolgrad.h"
diff --git a/src/tim/vx/ops/maxpoolwithargmax2.cc b/src/tim/vx/ops/maxpoolwithargmax2.cc
index a1bdc14..b867f5d 100644
--- a/src/tim/vx/ops/maxpoolwithargmax2.cc
+++ b/src/tim/vx/ops/maxpoolwithargmax2.cc
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 #include "tim/vx/ops/maxpoolwithargmax2.h"
 
 #include "direct_map_op_impl.h"
diff --git a/src/tim/vx/ops/maxpoolwithargmax2_test.cc b/src/tim/vx/ops/maxpoolwithargmax2_test.cc
index b7ddb2d..a6a1531 100644
--- a/src/tim/vx/ops/maxpoolwithargmax2_test.cc
+++ b/src/tim/vx/ops/maxpoolwithargmax2_test.cc
@@ -21,7 +21,7 @@
 *    DEALINGS IN THE SOFTWARE.
 *
 *****************************************************************************/
-#if VSI_FEAT_OP_MAXPOOLWITHARGMAX
+#ifdef VSI_FEAT_OP_MAXPOOLWITHARGMAX
 #include "tim/vx/context.h"
 #include "tim/vx/graph.h"
 #include "tim/vx/ops/maxpoolwithargmax2.h"