diff --git a/common/speculative.cpp b/common/speculative.cpp
index e6ec8f6ac62..0cb19048945 100644
--- a/common/speculative.cpp
+++ b/common/speculative.cpp
@@ -1,5 +1,7 @@
 #include "speculative.h"
 
+#include <cmath>
+
 #include "common.h"
 #include "ggml.h"
 #include "llama.h"