diff --git a/cmake/hex.cmake b/cmake/hex.cmake
index 5823dc9109b..c3935f613fd 100644
--- a/cmake/hex.cmake
+++ b/cmake/hex.cmake
@@ -34,6 +34,10 @@ function(from_hex HEX DEC)
 endfunction()
 
 function(to_hex DEC HEX)
+    if(DEC EQUAL 0)
+        set(${HEX} "0x0" PARENT_SCOPE)
+        return()
+    endif()
     while(DEC GREATER 0)
         math(EXPR _val "${DEC} % 16")
         math(EXPR DEC "${DEC} / 16")