diff --git a/compel/arch/aarch64/src/lib/infect.c b/compel/arch/aarch64/src/lib/infect.c
index 166ec2363..74e72ad39 100644
--- a/compel/arch/aarch64/src/lib/infect.c
+++ b/compel/arch/aarch64/src/lib/infect.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <sys/uio.h>
diff --git a/compel/arch/arm/src/lib/infect.c b/compel/arch/arm/src/lib/infect.c
index 27d258bc3..c574d00e1 100644
--- a/compel/arch/arm/src/lib/infect.c
+++ b/compel/arch/arm/src/lib/infect.c
@@ -1,3 +1,4 @@
+#include <stdlib.h>
 #include <sys/ptrace.h>
 #include <sys/types.h>
 #include <compel/plugins/std/syscall-codes.h>