diff --git a/cmake/modules/FindPleora.cmake b/cmake/modules/FindPleora.cmake
index b1a19fa..e60c37c 100644
--- a/cmake/modules/FindPleora.cmake
+++ b/cmake/modules/FindPleora.cmake
@@ -40,19 +40,21 @@ find_library (Pleora_LIBRARY_DEVICE PvDevice${_LIB_SUFFIX} ${Pleora_LIBRARY_DIR}
 
 set (Pleora_LIBRARIES ${Pleora_LIBRARY_BASE} ${Pleora_LIBRARY_DEVICE})
 
-file(STRINGS "${Pleora_INCLUDE_DIR}/PvVersion.h" _pleora_VERSION_CONTENTS REGEX "#define NVERSION_STRING")
-if ("${_pleora_VERSION_CONTENTS}" MATCHES "#define NVERSION_STRING[ \t]+\"([0-9]+)\\.([0-9]+)\\.([0-9]+)\\.([0-9]+)+")
-  set(Pleora_VERSION_MAJOR "${CMAKE_MATCH_1}")
-  set(Pleora_VERSION_MINOR "${CMAKE_MATCH_2}")
-  set(Pleora_VERSION_PATCH "${CMAKE_MATCH_3}")
-  set(Pleora_VERSION_TWEAK "${CMAKE_MATCH_4}")
-  set(Pleora_VERSION_COUNT 4)
-  set(Pleora_VERSION_STRING "${Pleora_VERSION_MAJOR}.${Pleora_VERSION_MINOR}.${Pleora_VERSION_PATCH}.${Pleora_VERSION_TWEAK}")
-  set(Pleora_VERSION ${Pleora_VERSION_STRING})
-  message(STATUS "Found Pleora version: ${Pleora_VERSION_STRING}")
+if (Pleora_INCLUDE_DIR)
+  file(STRINGS "${Pleora_INCLUDE_DIR}/PvVersion.h" _pleora_VERSION_CONTENTS REGEX "#define NVERSION_STRING")
+  if ("${_pleora_VERSION_CONTENTS}" MATCHES "#define NVERSION_STRING[ \t]+\"([0-9]+)\\.([0-9]+)\\.([0-9]+)\\.([0-9]+)+")
+    set(Pleora_VERSION_MAJOR "${CMAKE_MATCH_1}")
+    set(Pleora_VERSION_MINOR "${CMAKE_MATCH_2}")
+    set(Pleora_VERSION_PATCH "${CMAKE_MATCH_3}")
+    set(Pleora_VERSION_TWEAK "${CMAKE_MATCH_4}")
+    set(Pleora_VERSION_COUNT 4)
+    set(Pleora_VERSION_STRING "${Pleora_VERSION_MAJOR}.${Pleora_VERSION_MINOR}.${Pleora_VERSION_PATCH}.${Pleora_VERSION_TWEAK}")
+    set(Pleora_VERSION ${Pleora_VERSION_STRING})
+    message(STATUS "Found Pleora version: ${Pleora_VERSION_STRING}")
+  endif ()
 endif ()
 
 include (FindPackageHandleStandardArgs)
 find_package_handle_standard_args (Pleora
   REQUIRED_VARS Pleora_INCLUDE_DIR Pleora_LIBRARY_DIR Pleora_LIBRARIES
-  VERSION_VAR Pleora_VERSION_STRING)
\ No newline at end of file
+  VERSION_VAR Pleora_VERSION_STRING)