diff --git a/src/libs/utils/smallstring.h b/src/libs/utils/smallstring.h
index 1c6516a3c3a..d10225cbd9a 100644
--- a/src/libs/utils/smallstring.h
+++ b/src/libs/utils/smallstring.h
@@ -38,6 +38,7 @@
 #include <QString>
 
 #include <algorithm>
+#include <cmath>
 #include <cstdlib>
 #include <climits>
 #include <cstring>