diff --git a/include/tatami_stats/ranges.hpp b/include/tatami_stats/ranges.hpp
index c841ef2..2e191fe 100644
--- a/include/tatami_stats/ranges.hpp
+++ b/include/tatami_stats/ranges.hpp
@@ -2,6 +2,7 @@
 #define TATAMI_STATS_RANGES_HPP
 
 #include "tatami/tatami.hpp"
+#include "subpar/subpar.hpp"
 #include "utils.hpp"
 
 #include <vector>
diff --git a/include/tatami_stats/sums.hpp b/include/tatami_stats/sums.hpp
index 0cb6463..36b06b3 100644
--- a/include/tatami_stats/sums.hpp
+++ b/include/tatami_stats/sums.hpp
@@ -2,6 +2,7 @@
 #define TATAMI_STATS__SUMS_HPP
 
 #include "tatami/tatami.hpp"
+#include "subpar/subpar.hpp"
 #include "utils.hpp"
 
 #include <vector>
diff --git a/include/tatami_stats/variances.hpp b/include/tatami_stats/variances.hpp
index 42086f6..99867e8 100644
--- a/include/tatami_stats/variances.hpp
+++ b/include/tatami_stats/variances.hpp
@@ -2,6 +2,7 @@
 #define TATAMI_STATS_VARS_HPP
 
 #include "tatami/tatami.hpp"
+#include "subpar/subpar.hpp"
 #include "utils.hpp"
 
 #include <vector>