diff --git a/src/libsys/libsys.h b/src/libsys/libsys.h
index 92369bc..9b2cf86 100644
--- a/src/libsys/libsys.h
+++ b/src/libsys/libsys.h
@@ -63,6 +63,10 @@
 #define FLASH_BASE_MEM		0x00000000
 #endif
 
+// Backwards compatibility
+#define SYS_FLASH_IO		FLASH_BASE_IO
+#define SYS_FLASH_MEM		FLASH_BASE_MEM
+
 // GPIO
 #define	SYS_GPIO_0_BASE					(SYS_IO_BASE + 0)
 #define	SYS_GPIO_0_DATA					(SYS_GPIO_0_BASE + 0)
diff --git a/src/life.c b/src/life.c
index 91f3ce9..cf407e0 100644
--- a/src/life.c
+++ b/src/life.c
@@ -236,7 +236,7 @@ int main( int argc, char* argv[] ) {
 	while( 1 )
 	{
 
-		if (*pBtn & GPIO_0_BTN)
+		if (*pBtn & SYS_GPIO_0_DATA)
 		{
 			srand(clock());
 			initializeBoard( matrix );