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-rw-r--r--src/tempmodule/indicator.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/tempmodule/indicator.h b/src/tempmodule/indicator.h
index 21eec29..91d5ab3 100644
--- a/src/tempmodule/indicator.h
+++ b/src/tempmodule/indicator.h
@@ -1,3 +1,6 @@
+#ifndef INDICATOR_INCLUDED
+#define INDICATOR_INCLUDED
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -9,3 +12,5 @@ void indicator_calibrate(unsigned int const * const calibration);
#ifdef __cplusplus
}
#endif
+
+#endif /* INDICATOR_INCLUDED */