diff --git a/libzip-config.cmake.in b/libzip-config.cmake.in
index 80615303..d3c73cc4 100644
--- a/libzip-config.cmake.in
+++ b/libzip-config.cmake.in
@@ -1,17 +1,17 @@
 @PACKAGE_INIT@
 
 # We need to supply transitive dependencies if this config is for a static library
-set(IS_SHARED @BUILD_SHARED_LIBS@)
+set(IS_SHARED "@BUILD_SHARED_LIBS@")
 if (NOT IS_SHARED)
   include(CMakeFindDependencyMacro)
   set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/modules")
 
-  set(ENABLE_BZIP2 @BZIP2_FOUND@)
-  set(ENABLE_LZMA @LIBLZMA_FOUND@)
-  set(ENABLE_ZSTD @ZSTD_FOUND@)
-  set(ENABLE_GNUTLS @GNUTLS_FOUND@)
-  set(ENABLE_MBEDTLS @MBEDTLS_FOUND@)
-  set(ENABLE_OPENSSL @OPENSSL_FOUND@)
+  set(ENABLE_BZIP2 "@BZIP2_FOUND@")
+  set(ENABLE_LZMA "@LIBLZMA_FOUND@")
+  set(ENABLE_ZSTD "@ZSTD_FOUND@")
+  set(ENABLE_GNUTLS "@GNUTLS_FOUND@")
+  set(ENABLE_MBEDTLS "@MBEDTLS_FOUND@")
+  set(ENABLE_OPENSSL "@OPENSSL_FOUND@")
 
   find_dependency(ZLIB 1.1.2)
   if(ENABLE_BZIP2)