diff --git a/mace/core/integral_types.h b/mace/core/integral_types.h
index ac4c8803193458a1ab4ee027fe472fbc0c06de3c..72298201ef68403a93dbdb4d41087ad0f669e7a7 100644
--- a/mace/core/integral_types.h
+++ b/mace/core/integral_types.h
@@ -6,14 +6,14 @@
 #ifndef MACE_CORE_INTEGRAL_TYPES_H_
 #define MACE_CORE_INTEGRAL_TYPES_H_
 
-typedef signed char int8;
-typedef short int16;
-typedef int int32;
+typedef int8_t int8;
+typedef int16_t int16;
+typedef int32_t int32;
 typedef int64_t int64;
 
-typedef unsigned char uint8;
-typedef unsigned short uint16;
-typedef unsigned int uint32;
+typedef uint8_t uint8;
+typedef uint16_t uint16;
+typedef uint32_t uint32;
 typedef uint64_t uint64;
 
 #endif // MACE_CORE_INTEGRAL_TYPES_H_
diff --git a/mace/kernels/BUILD b/mace/kernels/BUILD
index a842356a25ac5f8ef94274e51eb294032cb89139..ca215d5adf03941c1475b1c1a931c0bbfd58ff8d 100644
--- a/mace/kernels/BUILD
+++ b/mace/kernels/BUILD
@@ -17,6 +17,9 @@ cc_library(
     deps = [
         "//mace/core:core",
     ],
-    copts = ['-std=c++11'],
+    copts = ['-std=c++11'] + if_android([
+        "-mfpu=neon", # TODO recheck the flags
+        "-mfloat-abi=hard",
+        ]),
 )