diff --git a/plugins/win-capture/graphics-hook/d3d10-capture.cpp b/plugins/win-capture/graphics-hook/d3d10-capture.cpp
index 18f7b2061..06c8082a9 100644
--- a/plugins/win-capture/graphics-hook/d3d10-capture.cpp
+++ b/plugins/win-capture/graphics-hook/d3d10-capture.cpp
@@ -54,7 +54,7 @@ struct d3d10_data {
 	};
 };
 
-struct d3d10_data data = {};
+static struct d3d10_data data = {};
 
 void d3d10_free(void)
 {
diff --git a/plugins/win-capture/graphics-hook/d3d11-capture.cpp b/plugins/win-capture/graphics-hook/d3d11-capture.cpp
index 6e65a2a69..4d3c9ee48 100644
--- a/plugins/win-capture/graphics-hook/d3d11-capture.cpp
+++ b/plugins/win-capture/graphics-hook/d3d11-capture.cpp
@@ -55,7 +55,7 @@ struct d3d11_data {
 	};
 };
 
-struct d3d11_data data = {};
+static struct d3d11_data data = {};
 
 void d3d11_free(void)
 {