diff --git a/src/include/deepstate/DeepState.h b/src/include/deepstate/DeepState.h
index aa363f4..29844d3 100644
--- a/src/include/deepstate/DeepState.h
+++ b/src/include/deepstate/DeepState.h
@@ -719,7 +719,7 @@ static int DeepState_RunSavedTestCases(void) {
   return num_failed_tests;
 }
 
-extern int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
   if (Size > sizeof(DeepState_Input)) {
     return 0; // Just ignore any too-big inputs
   }