diff --git a/tests/fuzz/Makefile b/tests/fuzz/Makefile
index e60c26e7b13c..149e44daa648 100644
--- a/tests/fuzz/Makefile
+++ b/tests/fuzz/Makefile
@@ -72,5 +72,7 @@ FUZZ_COMMON_OBJS := \
 $(FUZZ_TARGETS_OBJS): $(COMMON_HEADERS) $(WIRE_HEADERS) $(COMMON_SRC)
 $(FUZZ_TARGETS_BIN): $(LIBFUZZ_OBJS) $(FUZZ_COMMON_OBJS) $(BITCOIN_OBJS)
 
+tests/fuzz/fuzz-bolt12-tlvspan: common/bolt12.o
+
 ALL_C_SOURCES += $(FUZZ_TARGETS_SRC) $(LIBFUZZ_SRC)
 ALL_FUZZ_TARGETS += $(FUZZ_TARGETS_BIN)
diff --git a/tests/fuzz/corpora/fuzz-bolt12-tlvspan/013f5994e1814f29c2043c2b8bc6d0f991330c0d b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/013f5994e1814f29c2043c2b8bc6d0f991330c0d
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diff --git a/tests/fuzz/corpora/fuzz-bolt12-tlvspan/18b699fad648ccc1fea2ebf5593817f4e90d474f b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/18b699fad648ccc1fea2ebf5593817f4e90d474f
new file mode 100644
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diff --git a/tests/fuzz/corpora/fuzz-bolt12-tlvspan/1a41e29f4711e4efdd5da7d88714e342efcbdd23 b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/1a41e29f4711e4efdd5da7d88714e342efcbdd23
new file mode 100644
index 000000000000..8e1f75c684ae
--- /dev/null
+++ b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/1a41e29f4711e4efdd5da7d88714e342efcbdd23
@@ -0,0 +1 @@
+@@@@@@@@@@!@@@@O
\ No newline at end of file
diff --git a/tests/fuzz/corpora/fuzz-bolt12-tlvspan/1dcf87536a52793b43ce0833d231935839655367 b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/1dcf87536a52793b43ce0833d231935839655367
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@@ -0,0 +1,2 @@
+
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diff --git a/tests/fuzz/corpora/fuzz-bolt12-tlvspan/fd7c53ab1118728473c3f0b3cad10d3f8887833a b/tests/fuzz/corpora/fuzz-bolt12-tlvspan/fd7c53ab1118728473c3f0b3cad10d3f8887833a
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+
+@@@@žD©©©©VV…ýý
\ No newline at end of file
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diff --git a/tests/fuzz/fuzz-bolt12-tlvspan.c b/tests/fuzz/fuzz-bolt12-tlvspan.c
new file mode 100644
index 000000000000..bd681ae8c348
--- /dev/null
+++ b/tests/fuzz/fuzz-bolt12-tlvspan.c
@@ -0,0 +1,22 @@
+#include "config.h"
+#include <common/bolt12.h>
+#include <common/utils.h>
+#include <wire/wire.h>
+#include <tests/fuzz/libfuzz.h>
+
+void init(int *argc, char ***argv)
+{}
+
+void run(const u8 *data, size_t size)
+{
+	size_t span_start_offset, span_size;
+
+	u64 minfield = fromwire_u64(&data, &size);
+	u64 maxfield = fromwire_u64(&data, &size);
+
+	const u8 *buf = tal_dup_arr(tmpctx, u8, data, size, 0);
+	span_size = tlv_span(buf, minfield, maxfield, &span_start_offset);
+	assert(span_start_offset + span_size <= size);
+
+	clean_tmpctx();
+}