diff --git a/src/lib/prov/commoncrypto/commoncrypto_block.cpp b/src/lib/prov/commoncrypto/commoncrypto_block.cpp
index a07fe118d..f059ee497 100644
--- a/src/lib/prov/commoncrypto/commoncrypto_block.cpp
+++ b/src/lib/prov/commoncrypto/commoncrypto_block.cpp
@@ -11,6 +11,7 @@
 #include <botan/hex.h>
 #include <botan/internal/commoncrypto_utils.h>
 
+#include <CommonCrypto/CommonCryptoError.h>
 #include <CommonCrypto/CommonCrypto.h>
 
 namespace Botan {
diff --git a/src/lib/prov/commoncrypto/commoncrypto_hash.cpp b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
index 1fb79c419..faf9575c2 100644
--- a/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
+++ b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
@@ -11,6 +11,7 @@
 #include <botan/internal/stl_util.h>
 #include <unordered_map>
 
+#include <CommonCrypto/CommonCryptoError.h>
 #include <CommonCrypto/CommonCrypto.h>
 
 namespace Botan {
diff --git a/src/lib/prov/commoncrypto/commoncrypto_utils.h b/src/lib/prov/commoncrypto/commoncrypto_utils.h
index b1c7411fd..9becab2d1 100644
--- a/src/lib/prov/commoncrypto/commoncrypto_utils.h
+++ b/src/lib/prov/commoncrypto/commoncrypto_utils.h
@@ -10,6 +10,7 @@
 
 #include <botan/sym_algo.h>
 
+#include <CommonCrypto/CommonCryptoError.h>
 #include <CommonCrypto/CommonCrypto.h>
 
 namespace Botan {
diff --git a/src/lib/rng/system_rng/system_rng.cpp b/src/lib/rng/system_rng/system_rng.cpp
index b2f7b4c45..f4933b1e3 100644
--- a/src/lib/rng/system_rng/system_rng.cpp
+++ b/src/lib/rng/system_rng/system_rng.cpp
@@ -20,6 +20,7 @@
    #include <bcrypt.h>
    #include <windows.h>
 #elif defined(BOTAN_TARGET_OS_HAS_CCRANDOM)
+   #include <CommonCrypto/CommonCryptoError.h>
    #include <CommonCrypto/CommonRandom.h>
 #elif defined(BOTAN_TARGET_OS_HAS_ARC4RANDOM)
    #include <stdlib.h>