diff --git a/source/m3_compile.c b/source/m3_compile.c
index eaff26a..7ed3937 100644
--- a/source/m3_compile.c
+++ b/source/m3_compile.c
@@ -191,10 +191,6 @@ void  ReleaseCompilationCodePage  (IM3Compilation o)
     ReleaseCodePage (o->runtime, o->page);
 }
 
-
-static inline bool  IsStackPolymorphic          (IM3Compilation o);
-static inline M3Result  SetStackPolymorphic     (IM3Compilation o);
-
 static inline
 u16 GetTypeNumSlots (u8 i_type)
 {
diff --git a/source/m3_config_platforms.h b/source/m3_config_platforms.h
index 8a7fb0e..ecb5b74 100644
--- a/source/m3_config_platforms.h
+++ b/source/m3_config_platforms.h
@@ -95,6 +95,8 @@
 
 #if defined(__AVR__)
 
+#include <inttypes.h>
+
 # define PRIu64         "llu"
 # define PRIi64         "lli"