diff --git a/include/chipmunk/chipmunk_types.h b/include/chipmunk/chipmunk_types.h
index 9544da8..444f5c6 100644
--- a/include/chipmunk/chipmunk_types.h
+++ b/include/chipmunk/chipmunk_types.h
@@ -53,8 +53,12 @@
 #endif
 
 #ifndef CP_USE_DOUBLES
-	// Use doubles by default for higher precision.
-	#define CP_USE_DOUBLES 1
+	// Use doubles by default for higher precision when possible.
+	#if (!defined(__ARM_NEON__) || !__ARM_NEON__ || __arm64)
+		#define CP_USE_DOUBLES 1
+	#else
+		#define CP_USE_DOUBLES 0
+	#endif
 #endif
 
 /// @defgroup basicTypes Basic Types
diff --git a/src/cpHastySpace.c b/src/cpHastySpace.c
index 8dca425..3e3792c 100644
--- a/src/cpHastySpace.c
+++ b/src/cpHastySpace.c
@@ -8,7 +8,11 @@
 
 //#include <sys/param.h >
 #ifndef _WIN32
+#if defined(ANDROID)
+#include <linux/sysctl.h>
+#else
 #include <sys/sysctl.h>
+#endif
 #include <pthread.h>
 #else
 #ifndef WIN32_LEAN_AND_MEAN