1 files changed, 1 insertions, 0 deletions
diff --git a/cpp/src/Slice/DotNetNames.cpp b/cpp/src/Slice/DotNetNames.cpp
index ab5b4d5ec0c..89d12eb61f2 100755
--- a/cpp/src/Slice/DotNetNames.cpp
+++ b/cpp/src/Slice/DotNetNames.cpp
@@ -8,6 +8,7 @@
 // **********************************************************************
 
 #include <Slice/DotNetNames.h>
+#include <ctype.h>
 
 using namespace std;