diff --git a/src/sfizz/FileMetadata.cpp b/src/sfizz/FileMetadata.cpp
index dff53ac3..60f6d64e 100644
--- a/src/sfizz/FileMetadata.cpp
+++ b/src/sfizz/FileMetadata.cpp
@@ -16,6 +16,7 @@
 #include <string>
 #include <cstdio>
 #include <cstring>
+#include <cmath>
 
 namespace sfz {