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-rw-r--r--libnm-core/nm-property-compare.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/libnm-core/nm-property-compare.h b/libnm-core/nm-property-compare.h
index b859989f..da2aaf2c 100644
--- a/libnm-core/nm-property-compare.h
+++ b/libnm-core/nm-property-compare.h
@@ -23,6 +23,10 @@
 #ifndef __NM_PROPERTY_COMPARE_H__
 #define __NM_PROPERTY_COMPARE_H__
 
+#if !((NETWORKMANAGER_COMPILATION) & NM_NETWORKMANAGER_COMPILATION_WITH_LIBNM_CORE_PRIVATE)
+#error Cannot use this header.
+#endif
+
 int nm_property_compare (GVariant *value1, GVariant *value2);
 
 #endif /* __NM_PROPERTY_COMPARE_H__ */