1diff --git a/src/lib/prov/commoncrypto/commoncrypto_block.cpp b/src/lib/prov/commoncrypto/commoncrypto_block.cpp
2index a07fe118d..f059ee497 100644
3--- a/src/lib/prov/commoncrypto/commoncrypto_block.cpp
4+++ b/src/lib/prov/commoncrypto/commoncrypto_block.cpp
5@@ -11,6 +11,7 @@
6 #include <botan/hex.h>
7 #include <botan/internal/commoncrypto_utils.h>
8
9+#include <CommonCrypto/CommonCryptoError.h>
10 #include <CommonCrypto/CommonCrypto.h>
11
12 namespace Botan {
13diff --git a/src/lib/prov/commoncrypto/commoncrypto_hash.cpp b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
14index 1fb79c419..faf9575c2 100644
15--- a/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
16+++ b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
17@@ -11,6 +11,7 @@
18 #include <botan/internal/stl_util.h>
19 #include <unordered_map>
20
21+#include <CommonCrypto/CommonCryptoError.h>
22 #include <CommonCrypto/CommonCrypto.h>
23
24 namespace Botan {
25diff --git a/src/lib/prov/commoncrypto/commoncrypto_utils.h b/src/lib/prov/commoncrypto/commoncrypto_utils.h
26index b1c7411fd..9becab2d1 100644
27--- a/src/lib/prov/commoncrypto/commoncrypto_utils.h
28+++ b/src/lib/prov/commoncrypto/commoncrypto_utils.h
29@@ -10,6 +10,7 @@
30
31 #include <botan/sym_algo.h>
32
33+#include <CommonCrypto/CommonCryptoError.h>
34 #include <CommonCrypto/CommonCrypto.h>
35
36 namespace Botan {
37diff --git a/src/lib/rng/system_rng/system_rng.cpp b/src/lib/rng/system_rng/system_rng.cpp
38index b2f7b4c45..f4933b1e3 100644
39--- a/src/lib/rng/system_rng/system_rng.cpp
40+++ b/src/lib/rng/system_rng/system_rng.cpp
41@@ -20,6 +20,7 @@
42 #include <bcrypt.h>
43 #include <windows.h>
44 #elif defined(BOTAN_TARGET_OS_HAS_CCRANDOM)
45+ #include <CommonCrypto/CommonCryptoError.h>
46 #include <CommonCrypto/CommonRandom.h>
47 #elif defined(BOTAN_TARGET_OS_HAS_ARC4RANDOM)
48 #include <stdlib.h>