diff --git a/testing/btest/plugins/file-plugin/CMakeLists.txt b/testing/btest/plugins/file-plugin/CMakeLists.txt
index 4823ddb08f..1d0941d9da 100644
--- a/testing/btest/plugins/file-plugin/CMakeLists.txt
+++ b/testing/btest/plugins/file-plugin/CMakeLists.txt
@@ -9,6 +9,9 @@ endif ()
 
 set(CMAKE_MODULE_PATH ${BRO_DIST}/cmake)
 
+find_package(OpenSSL)
+include_directories(${OPENSSL_INCLUDE_DIR})
+
 include(BroPlugin)
 
 bro_plugin_begin(Demo Foo)
diff --git a/testing/btest/plugins/protocol-plugin/CMakeLists.txt b/testing/btest/plugins/protocol-plugin/CMakeLists.txt
index 4bc8460c06..a10fff1d67 100644
--- a/testing/btest/plugins/protocol-plugin/CMakeLists.txt
+++ b/testing/btest/plugins/protocol-plugin/CMakeLists.txt
@@ -9,6 +9,9 @@ endif ()
 
 set(CMAKE_MODULE_PATH ${BRO_DIST}/cmake)
 
+find_package(OpenSSL)
+include_directories(${OPENSSL_INCLUDE_DIR})
+
 include(BroPlugin)
 
 bro_plugin_begin(Demo Foo)