diff --git a/tests/fuzz/fuzzer_platform.cpp b/tests/fuzz/fuzzer_platform.cpp
index 74499377e..e93cbfc5f 100644
--- a/tests/fuzz/fuzzer_platform.cpp
+++ b/tests/fuzz/fuzzer_platform.cpp
@@ -228,7 +228,7 @@ otPlatResetReason otPlatGetResetReason(otInstance *aInstance)
     return OT_PLAT_RESET_REASON_POWER_ON;
 }
 
-void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat, ...)
+OT_TOOL_WEAK void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat, ...)
 {
     OT_UNUSED_VARIABLE(aLogLevel);
     OT_UNUSED_VARIABLE(aLogRegion);