diff --git a/src/core/msystem.cpp b/src/core/msystem.cpp
index f63c3cb..025442d 100644
--- a/src/core/msystem.cpp
+++ b/src/core/msystem.cpp
@@ -78,7 +78,7 @@
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <time.h>
-#if defined(HAVE_MALLOC_H)
+#if HAVE_MALLOC_H && !IS_AROS
 #include <malloc.h>
 #endif
 #include <string.h>
diff --git a/src/twparser/yylex.cpp b/src/twparser/yylex.cpp
index 5fc5b78..b77935b 100644
--- a/src/twparser/yylex.cpp
+++ b/src/twparser/yylex.cpp
@@ -515,7 +515,7 @@ const int MIN_NUM_STATES = 20;
 //#endif
 
 #include <stdio.h>
-#ifdef HAVE_MALLOC_H
+#if HAVE_MALLOC_H && !IS_AROS
 #include <malloc.h>
 #endif
 #include <stdlib.h>