diff --git a/src/include/deepstate/Log.h b/src/include/deepstate/Log.h
index 9fb6e14..107cd9f 100644
--- a/src/include/deepstate/Log.h
+++ b/src/include/deepstate/Log.h
@@ -23,6 +23,8 @@
 
 DEEPSTATE_BEGIN_EXTERN_C
 
+extern int DeepState_UsingLibFuzzer;
+
 struct DeepState_Stream;
 
 struct DeepState_VarArgs {
diff --git a/src/lib/DeepState.c b/src/lib/DeepState.c
index 70c6d60..3096fb5 100644
--- a/src/lib/DeepState.c
+++ b/src/lib/DeepState.c
@@ -549,8 +549,8 @@ extern int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
     return 0; // Just ignore any too-big inputs
   }
 
-  printf("LLVM fuzzing with input of size %ul\n", Size);
-
+  DeepState_UsingLibFuzzer = 1;
+  
   struct DeepState_TestInfo *test = NULL;
 
   DeepState_InitOptions(0, "");  
diff --git a/src/lib/Log.c b/src/lib/Log.c
index c027ac6..dca7cb2 100644
--- a/src/lib/Log.c
+++ b/src/lib/Log.c
@@ -64,6 +64,8 @@ enum {
   DeepState_LogBufSize = 4096
 };
 
+int DeepState_UsingLibFuzzer = 0;
+
 char DeepState_LogBuf[DeepState_LogBufSize + 1] = {};
 
 /* Log a C string. */
@@ -144,7 +146,17 @@ int __vprintf_chk(int flag, const char *format, va_list args) {
 
 DEEPSTATE_NOINLINE
 int vfprintf(FILE *file, const char *format, va_list args) {
-  if (stderr == file) {
+  if (DeepState_UsingLibFuzzer) {
+    if (stderr == file) {
+      // Silence DeepState output
+      // DeepState_LogVFormat(DeepState_LogDebug, format, args);
+    } else if (stdout == file) {
+      // Silence DeepState output      
+      // DeepState_LogVFormat(DeepState_LogInfo, format, args);
+    } else {
+      DeepState_LogVFormat(DeepState_LogInfo, format, args);
+    }
+  } else if (stderr == file) {
     DeepState_LogVFormat(DeepState_LogDebug, format, args);
   } else if (stdout == file) {
     DeepState_LogVFormat(DeepState_LogInfo, format, args);