diff --git a/cmake/ncnnConfig.cmake.in b/cmake/ncnnConfig.cmake.in
index 4f51801277d..6bed3b8da49 100644
--- a/cmake/ncnnConfig.cmake.in
+++ b/cmake/ncnnConfig.cmake.in
@@ -24,7 +24,18 @@ if(NCNN_VULKAN)
         if(NCNN_SYSTEM_GLSLANG)
             find_package(SPIRV-Tools QUIET)
             find_package(SPIRV-Tools-opt QUIET)
-            find_package(glslang REQUIRED)
+            find_package(glslang QUIET)
+            if(NOT glslang_FOUND)
+                set(GLSLANG_TARGET_DIR "@GLSLANG_TARGET_DIR@")
+                include(${GLSLANG_TARGET_DIR}/OSDependentTargets.cmake)
+                include(${GLSLANG_TARGET_DIR}/OGLCompilerTargets.cmake)
+                if(EXISTS "${GLSLANG_TARGET_DIR}/HLSLTargets.cmake")
+                    # hlsl support can be optional
+                    include("${GLSLANG_TARGET_DIR}/HLSLTargets.cmake")
+                endif()
+                include(${GLSLANG_TARGET_DIR}/glslangTargets.cmake)
+                include(${GLSLANG_TARGET_DIR}/SPIRVTargets.cmake)
+            endif()
         else()
             set(glslang_DIR "${CMAKE_CURRENT_LIST_DIR}/../../../@CMAKE_INSTALL_LIBDIR@/cmake/glslang")
             find_package(glslang QUIET)