diff --git a/CMakeLists.txt b/CMakeLists.txt
index bb6ccf1..a0df85f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1913,8 +1913,10 @@ if(NOT CURL_DISABLE_INSTALL)
     set(CPPFLAG_CURL_STATICLIB "")
   else()
     set(ENABLE_SHARED         "no")
+    set(LIBCURL_PC_REQUIRES_PRIVATE "") # flattened into LIBCURL_LIBS 
     set(LIBCURL_PC_REQUIRES   "${LIBCURL_PC_REQUIRES_PRIVATE}")
     set(LIBCURL_NO_SHARED     "${LIBCURL_LIBS}")
+    set(LIBCURL_LIBS          "")
     set(CPPFLAG_CURL_STATICLIB "-DCURL_STATICLIB")
   endif()
   if(BUILD_STATIC_LIBS)