diff --git a/core/src/Barcode.cpp b/core/src/Barcode.cpp
index 7163c1f480..41b2137d36 100644
--- a/core/src/Barcode.cpp
+++ b/core/src/Barcode.cpp
@@ -12,7 +12,6 @@
 
 #ifdef ZXING_EXPERIMENTAL_API
 #include "BitMatrix.h"
-#endif
 
 #ifdef ZXING_USE_ZINT
 #include <zint.h>
@@ -22,6 +21,9 @@ void zint_symbol_deleter::operator()(zint_symbol* p) const noexcept
 }
 #else
 struct zint_symbol {};
+void zint_symbol_deleter::operator()(zint_symbol*) const noexcept {}
+#endif
+
 #endif
 
 #include <cmath>
diff --git a/core/src/Barcode.h b/core/src/Barcode.h
index f7ac4608d3..051205ae41 100644
--- a/core/src/Barcode.h
+++ b/core/src/Barcode.h
@@ -18,11 +18,11 @@
 
 #ifdef ZXING_EXPERIMENTAL_API
 #include <memory>
-extern "C" struct zint_symbol;
 namespace ZXing {
 class BitMatrix;
 }
 
+extern "C" struct zint_symbol;
 struct zint_symbol_deleter
 {
 	void operator()(zint_symbol* p) const noexcept;