diff --git a/src/config.def b/src/config.def
index a709c0be..2e503f21 100644
--- a/src/config.def
+++ b/src/config.def
@@ -25,7 +25,7 @@ OPTION(bool, physical_addressing, false)
 OPTION(std::string, clspv_native_builtins, "")
 OPTION(std::string, clspv_library_builtins, "")
 
-OPTION(uint32_t, printf_buffer_size, 1048576u)
+OPTION(uint32_t, printf_buffer_size, 1024*1024u)
 
 #if COMPILER_AVAILABLE
 OPTION(std::string, clspv_options, "")