diff --git a/firmware/baseband/access_code_correlator.cpp b/firmware/baseband/access_code_correlator.cpp
index f45052b09..654983e9e 100644
--- a/firmware/baseband/access_code_correlator.cpp
+++ b/firmware/baseband/access_code_correlator.cpp
@@ -32,13 +32,3 @@ void AccessCodeCorrelator::configure(
 		maximum_hamming_distance = new_maximum_hamming_distance;
 	}
 }
-
-bool AccessCodeCorrelator::execute(
-	const uint_fast8_t in
-) {
-	history = (history << 1) | (in & 1);
-	const auto delta_bits = (history ^ code) & mask;
-	//const size_t count = __builtin_popcountll(delta_bits);
-	const size_t count = __builtin_popcountl(delta_bits);
-	return (count <= maximum_hamming_distance);
-}
diff --git a/firmware/baseband/access_code_correlator.hpp b/firmware/baseband/access_code_correlator.hpp
index 0570dcf43..e1e447f4f 100644
--- a/firmware/baseband/access_code_correlator.hpp
+++ b/firmware/baseband/access_code_correlator.hpp
@@ -33,7 +33,15 @@ public:
 		const size_t new_maximum_hamming_distance
 	);
 
-	bool execute(const uint_fast8_t in);
+	bool operator()(
+		const uint_fast8_t in
+	) {
+		history = (history << 1) | (in & 1);
+		const auto delta_bits = (history ^ code) & mask;
+		//const size_t count = __builtin_popcountll(delta_bits);
+		const size_t count = __builtin_popcountl(delta_bits);
+		return (count <= maximum_hamming_distance);
+	}
 
 private:
 	uint32_t code { 0 };
diff --git a/firmware/baseband/proc_fsk.cpp b/firmware/baseband/proc_fsk.cpp
index f2b1ef060..23e9c6886 100644
--- a/firmware/baseband/proc_fsk.cpp
+++ b/firmware/baseband/proc_fsk.cpp
@@ -107,7 +107,7 @@ void FSKProcessor::consume_symbol(
 
 	const uint_fast8_t sliced_symbol = (raw_symbol >= 0.0f) ? 1 : 0;
 	const auto decoded_symbol = nrzi_decode(sliced_symbol);
-	const bool access_code_found = access_code_correlator.execute(decoded_symbol);
+	const bool access_code_found = access_code_correlator(decoded_symbol);
 
 	packet_builder.execute(
 		decoded_symbol,