diff --git a/src/core/struct.c b/src/core/struct.c
index 731e35da..bd3afae6 100644
--- a/src/core/struct.c
+++ b/src/core/struct.c
@@ -24,6 +24,7 @@
 #include <janet/janet.h>
 #include "gc.h"
 #include "util.h"
+#include <math.h>
 #endif
 
 /* Begin creation of a struct */
diff --git a/src/core/table.c b/src/core/table.c
index a63f2430..23bd44dc 100644
--- a/src/core/table.c
+++ b/src/core/table.c
@@ -24,6 +24,7 @@
 #include <janet/janet.h>
 #include "gc.h"
 #include "util.h"
+#include <math.h>
 #endif
 
 /* Initialize a table */