diff --git a/src/common/mac/SimpleStringDictionary.mm b/src/common/mac/SimpleStringDictionary.mm
index 567855e0..d9c791cc 100644
--- a/src/common/mac/SimpleStringDictionary.mm
+++ b/src/common/mac/SimpleStringDictionary.mm
@@ -31,6 +31,8 @@
 //  Simple string dictionary that does not allocate memory
 //
 
+#include <assert.h>
+
 #import "SimpleStringDictionary.h"
 
 namespace google_breakpad {
diff --git a/src/common/mac/dwarf/bytereader.cc b/src/common/mac/dwarf/bytereader.cc
index 823cf2b6..906fbb32 100644
--- a/src/common/mac/dwarf/bytereader.cc
+++ b/src/common/mac/dwarf/bytereader.cc
@@ -26,8 +26,9 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#include "common/mac/dwarf/bytereader-inl.h"
+#include <assert.h>
 
+#include "common/mac/dwarf/bytereader-inl.h"
 #include "common/mac/dwarf/bytereader.h"
 
 namespace dwarf2reader {
diff --git a/src/common/mac/dwarf/dwarf2reader.cc b/src/common/mac/dwarf/dwarf2reader.cc
index dd21561d..e43029cc 100644
--- a/src/common/mac/dwarf/dwarf2reader.cc
+++ b/src/common/mac/dwarf/dwarf2reader.cc
@@ -26,6 +26,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#include <assert.h>
+
 #include <stack>
 #include <utility>
 
diff --git a/src/common/mac/dwarf/functioninfo.cc b/src/common/mac/dwarf/functioninfo.cc
index 3501c035..04165dc0 100644
--- a/src/common/mac/dwarf/functioninfo.cc
+++ b/src/common/mac/dwarf/functioninfo.cc
@@ -29,11 +29,12 @@
 // This is a client for the dwarf2reader to extract function and line
 // information from the debug info.
 
+#include <assert.h>
+
 #include <map>
 #include <queue>
 #include <vector>
 
-
 #include "common/mac/dwarf/functioninfo.h"
 
 #include "common/mac/dwarf/bytereader.h"