diff --git a/mocktracer/src/tracer_factory.cpp b/mocktracer/src/tracer_factory.cpp
index 1c672ce..c58610a 100644
--- a/mocktracer/src/tracer_factory.cpp
+++ b/mocktracer/src/tracer_factory.cpp
@@ -5,6 +5,7 @@
 #include <fstream>
 #include <stdexcept>
 #include <string>
+#include <cctype>
 
 namespace opentracing {
 BEGIN_OPENTRACING_ABI_NAMESPACE
diff --git a/src/dynamic_load.cpp b/src/dynamic_load.cpp
index cee0dc3..d36c062 100644
--- a/src/dynamic_load.cpp
+++ b/src/dynamic_load.cpp
@@ -1,4 +1,3 @@
-#include <dlfcn.h>
 #include <opentracing/dynamic_load.h>
 #include <opentracing/version.h>