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-rw-r--r--src/wasm-stream.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/wasm-stream.h b/src/wasm-stream.h
index d0d152ef..1545ecd3 100644
--- a/src/wasm-stream.h
+++ b/src/wasm-stream.h
@@ -59,7 +59,7 @@ void wasm_move_data(WasmStream*,
size_t src_offset,
size_t size);
-void wasm_writef(WasmStream*, const char* format, ...);
+void WASM_PRINTF_FORMAT(2, 3) wasm_writef(WasmStream*, const char* format, ...);
/* specified as uint32_t instead of uint8_t so we can check if the value given
* is in range before wrapping */
void wasm_write_u8(WasmStream*, uint32_t value, const char* desc);