diff --git a/source/build/include/compat.h b/source/build/include/compat.h
index 930315c4f..8c61fd125 100644
--- a/source/build/include/compat.h
+++ b/source/build/include/compat.h
@@ -52,7 +52,7 @@
 
 ////////// Platform headers //////////
 
-#if !defined __APPLE__ && (!defined EDUKE32_BSD || !__STDC__)
+#if !defined __APPLE__ && (!defined EDUKE32_BSD || !__STDC__) && !defined __OpenBSD__ && !defined __DragonFly__
 # include <malloc.h>
 #endif
 
diff --git a/source/common/engine/printf.h b/source/common/engine/printf.h
index 3c6164f76..69d3e7d45 100644
--- a/source/common/engine/printf.h
+++ b/source/common/engine/printf.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <stdarg.h>
 
 #if defined __GNUC__ || defined __clang__
 # define ATTRIBUTE(attrlist) __attribute__(attrlist)