diff --git a/src/traced/probes/ftrace/cpu_reader_fuzzer.cc b/src/traced/probes/ftrace/cpu_reader_fuzzer.cc
index 27e5db3..47c5351 100644
--- a/src/traced/probes/ftrace/cpu_reader_fuzzer.cc
+++ b/src/traced/probes/ftrace/cpu_reader_fuzzer.cc
@@ -39,6 +39,7 @@
 using perfetto::protos::pbzero::FtraceEventBundle;
 
 void FuzzCpuReaderParsePage(const uint8_t* data, size_t size);
+void FuzzCpuReaderProcessPagesForDataSource(const uint8_t* data, size_t size);
 
 // TODO(rsavitski): make the fuzzer generate multi-page payloads.
 void FuzzCpuReaderProcessPagesForDataSource(const uint8_t* data, size_t size) {