diff --git a/fakegen.rb b/fakegen.rb
index 3659640..26ba522 100644
--- a/fakegen.rb
+++ b/fakegen.rb
@@ -10,6 +10,8 @@ $MAX_CALL_HISTORY = 50
 
 def include_dependencies
   putd "#include <stdarg.h>"
+  putd "#include <string.h> /* For memset and memcpy */"
+  putd ""
 end
 
 def output_constants
diff --git a/fff.h b/fff.h
index 1d61d56..1d2f9b3 100644
--- a/fff.h
+++ b/fff.h
@@ -27,6 +27,8 @@ SOFTWARE.
 #define FAKE_FUNCTIONS
 
 #include <stdarg.h>
+#include <string.h> /* For memset and memcpy */
+
 #define FFF_MAX_ARGS (20u)
 #ifndef FFF_ARG_HISTORY_LEN
     #define FFF_ARG_HISTORY_LEN (50u)