diff --git a/cmake/FindOpenSSLbins.cmake b/cmake/FindOpenSSLbins.cmake
index 3f32994a0..3d791f463 100644
--- a/cmake/FindOpenSSLbins.cmake
+++ b/cmake/FindOpenSSLbins.cmake
@@ -44,7 +44,7 @@ if(OPENSSL_FOUND)
       get_filename_component(OPENSSL_EXECUTABLE_PATH ${OPENSSL_EXECUTABLE} DIRECTORY)
       message(VERBOSE "OPENSSL_EXECUTABLE_PATH=${OPENSSL_EXECUTABLE_PATH}")
       set(OPENSSL_EXECUTABLE_BIN_PATH "")
-      string(REGEX MATCH "^(.*)/tools/openssl$" REGEX_MATCH ${OPENSSL_EXECUTABLE_PATH})
+      string(REGEX MATCH "^(.*)/tools/openssl$" REGEX_MATCH "${OPENSSL_EXECUTABLE_PATH}")
       message(DEBUG "REGEX_MATCH=\"${REGEX_MATCH}\"")
       message(DEBUG "CMAKE_MATCH_1=\"${CMAKE_MATCH_1}\"")
       if (NOT ${REGEX_MATCH} EQUAL "")