diff --git a/CMakeLists.txt b/CMakeLists.txt
index 87656de6..e42034b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -418,6 +418,7 @@ if(MZ_OPENSSL)
         list(APPEND MINIZIP_LIB ${OPENSSL_LIBRARIES})
         list(APPEND MINIZIP_LBD ${OPENSSL_LIBRARY_DIRS})
 
+
         if(OPENSSL_INCLUDE_DIRS)
             message(STATUS "Using OpenSSL include directory: ${OPENSSL_INCLUDE_DIRS}")
             list(APPEND MINIZIP_INC ${OPENSSL_INCLUDE_DIRS})
@@ -426,6 +427,15 @@ if(MZ_OPENSSL)
             message(STATUS "Using OpenSSL include directory: ${OPENSSL_INCLUDE_DIR}")
             list(APPEND MINIZIP_INC ${OPENSSL_INCLUDE_DIR})
         endif()
+        if(EXISTS ${OPENSSL_INCLUDE_DIR}/err.h)
+            message(STATUS "Found err.h")
+        endif()
+        if(EXISTS ${OPENSSL_INCLUDE_DIR}/openssl/err.h)
+            message(STATUS "Found openssl/err.h")
+        endif()
+        if(EXISTS ${OPENSSL_INCLUDE_DIR}/openssl/ssl.h)
+            message(STATUS "Found openssl/ssl.h")
+        endif()
 
         foreach(i ${OPENSSL_LIBRARIES})
             set(PC_PRIVATE_LIBS "${PC_PRIVATE_LIBS} -l${i}")