diff --git a/src/external/fortplot_zlib_core.f90 b/src/external/fortplot_zlib_core.f90
index a4e43667..f59505d9 100644
--- a/src/external/fortplot_zlib_core.f90
+++ b/src/external/fortplot_zlib_core.f90
@@ -562,7 +562,6 @@ subroutine deflate_compress(input_data, input_len, output_data, output_len)
         ! Hash table for LZ77
         integer :: hash_table(0:HASH_SIZE-1)
         integer :: hash_chain(WINDOW_SIZE)
-        save :: hash_table, hash_chain
         
         ! Huffman tables (fixed Huffman for simplicity)
         integer :: literal_codes(0:285)