diff --git a/.vscode/settings.json b/.vscode/settings.json
index d824262..9ad8f3e 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -7,7 +7,8 @@
         "lib.h": "c",
         "common.h": "c",
         "modulator.h": "c",
-        "control_pipe.h": "c"
+        "control_pipe.h": "c",
+        "stdlib.h": "c"
     },
     "C_Cpp.codeAnalysis.clangTidy.checks.disabled": [
         "clang-diagnostic-error"
diff --git a/src/common.h b/src/common.h
index 58a27dc..bd23abd 100644
--- a/src/common.h
+++ b/src/common.h
@@ -1,3 +1,4 @@
+#include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>