diff --git a/justfile b/justfile
index 92ff982..3d0aa64 100644
--- a/justfile
+++ b/justfile
@@ -18,8 +18,7 @@ just_sha := "a2ff42e6c37ba5c429d444f3a18d3633e59f9a34" # 1.24.0
 include_args := "-Isrc/ -I" + ts_path + "/lib/include -Inode_modules/nan"
 general_cflags := "-Wall -Werror --pedantic -Wno-format-pedantic"
 
-# FIXME: there are errors running with ASAN, we ideally want `,address` here
-fuzzer_flags := env("FUZZER_FLAGS", "-fsanitize=fuzzer,undefined")
+fuzzer_flags := env("FUZZER_FLAGS", "-fsanitize=fuzzer,address,undefined")
 fuzz_time := env("FUZZ_TOTAL_TIME", "1200")
 
 # Source files needed to build a parser
diff --git a/src/scanner.c b/src/scanner.c
index 848e601..4328dea 100644
--- a/src/scanner.c
+++ b/src/scanner.c
@@ -16,6 +16,12 @@
 #define __FILE_NAME__ __FILE__
 #endif
 
+#ifdef __GNUC__
+#define unused_attr __attribute__((unused))
+#else
+#define unused_attr
+#endif
+
 #ifdef DEBUG_PRINT
 #define dbg_print(...)                                                         \
   do {                                                                         \
@@ -56,7 +62,7 @@ enum TokenType {
   TOKEN_TYPE_END,
 };
 
-void assert_valid_token(const TSSymbol sym) {
+unused_attr static inline void assert_valid_token(const TSSymbol sym) {
   assertf(sym >= INDENT && sym < TOKEN_TYPE_END, "invalid symbol %d", sym);
 }