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-rw-r--r--src/stm/ao_arch.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stm/ao_arch.h b/src/stm/ao_arch.h
index d0dd3c79..87eda18b 100644
--- a/src/stm/ao_arch.h
+++ b/src/stm/ao_arch.h
@@ -31,6 +31,7 @@
#ifndef AO_TICK_TYPE
#define AO_TICK_TYPE uint16_t
+#define AO_TICK_SIGNED int16_t
#endif
/* Various definitions to make GCC look more like SDCC */