diff --git a/src/common/utility/vectors.h b/src/common/utility/vectors.h
index b56b36e7b..e8c39fc28 100644
--- a/src/common/utility/vectors.h
+++ b/src/common/utility/vectors.h
@@ -40,6 +40,7 @@
 #ifndef VECTORS_H
 #define VECTORS_H
 
+#include <cstddef>
 #include <math.h>
 #include <float.h>
 #include <string.h>
diff --git a/src/rendering/swrenderer/drawers/r_draw.cpp b/src/rendering/swrenderer/drawers/r_draw.cpp
index 671d39836..fa7f9c9c4 100644
--- a/src/rendering/swrenderer/drawers/r_draw.cpp
+++ b/src/rendering/swrenderer/drawers/r_draw.cpp
@@ -33,6 +33,7 @@
 */
 
 #include <stddef.h>
+#include <cmath>
 
 #include "templates.h"
 #include "doomdef.h"