diff --git a/include/Surelog/Cache/Cache.h b/include/Surelog/Cache/Cache.h
index b14f3aabdd..2d99337ef7 100644
--- a/include/Surelog/Cache/Cache.h
+++ b/include/Surelog/Cache/Cache.h
@@ -28,6 +28,7 @@
 #include <Surelog/Cache/Cache.capnp.h>
 #include <Surelog/Common/PathId.h>
 #include <Surelog/ErrorReporting/Error.h>
+#include <capnp/blob.h>
 #include <capnp/list.h>
 
 #include <cstdint>
diff --git a/src/Cache/Cache.cpp b/src/Cache/Cache.cpp
index 698ee1a505..2c29832266 100644
--- a/src/Cache/Cache.cpp
+++ b/src/Cache/Cache.cpp
@@ -23,6 +23,7 @@
 
 #include "Surelog/Cache/Cache.h"
 
+#include <capnp/blob.h>
 #include <capnp/list.h>
 #include <capnp/serialize-packed.h>
 
diff --git a/src/Cache/PPCache.cpp b/src/Cache/PPCache.cpp
index 8fa8e634a2..21df021206 100644
--- a/src/Cache/PPCache.cpp
+++ b/src/Cache/PPCache.cpp
@@ -23,6 +23,7 @@
 
 #include "Surelog/Cache/PPCache.h"
 
+#include <capnp/blob.h>
 #include <capnp/list.h>
 #include <capnp/serialize-packed.h>
 #include <fcntl.h>
diff --git a/src/Cache/ParseCache.cpp b/src/Cache/ParseCache.cpp
index 4619b8b1d7..8852b5d55c 100644
--- a/src/Cache/ParseCache.cpp
+++ b/src/Cache/ParseCache.cpp
@@ -23,6 +23,7 @@
 
 #include "Surelog/Cache/ParseCache.h"
 
+#include <capnp/blob.h>
 #include <capnp/list.h>
 #include <capnp/serialize-packed.h>
 #include <fcntl.h>
diff --git a/src/Cache/PythonAPICache.cpp b/src/Cache/PythonAPICache.cpp
index 2f8a428152..d21c3d66f8 100644
--- a/src/Cache/PythonAPICache.cpp
+++ b/src/Cache/PythonAPICache.cpp
@@ -23,6 +23,7 @@
 
 #include "Surelog/Cache/PythonAPICache.h"
 
+#include <capnp/blob.h>
 #include <capnp/list.h>
 #include <capnp/serialize-packed.h>
 #include <fcntl.h>