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-rw-r--r--src/google/protobuf/compiler/importer.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/importer.cc b/src/google/protobuf/compiler/importer.cc
index 8a07dfc..7689ce9 100644
--- a/src/google/protobuf/compiler/importer.cc
+++ b/src/google/protobuf/compiler/importer.cc
@@ -59,6 +59,7 @@ namespace compiler {
#ifndef F_OK
#define F_OK 00 // not defined by MSVC for whatever reason
#endif
+#include <ctype.h>
#endif
// Returns true if the text looks like a Windows-style absolute path, starting