diff --git libxavna/include/xavna.h libxavna/include/xavna.h
index 376a975..fd102d2 100644
--- libxavna/include/xavna.h
+++ libxavna/include/xavna.h
@@ -1,6 +1,8 @@
 #pragma once
 
+#ifdef __cplusplus
 extern "C" {
+#endif
 	struct autoSweepDataPoint {
 		// indexed by [port][real_or_imag]
 		double forward[2][2], reverse[2][2];
@@ -59,5 +61,6 @@ extern "C" {
 
 	// close device handle
 	void xavna_close(void* dev);
+#ifdef __cplusplus
 }
-
+#endif