diff --git a/compat/mingw.c b/compat/mingw.c
index 4276297595e21064abe2c0fb496f90d39455e200..8141f77189c66b07a1e1cd5ab92418d0de4617e5 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1632,7 +1632,7 @@ int mingw_kill(pid_t pid, int sig)
  */
 char *mingw_getenv(const char *name)
 {
-#define GETENV_MAX_RETAIN 30
+#define GETENV_MAX_RETAIN 64
 	static char *values[GETENV_MAX_RETAIN];
 	static int value_counter;
 	int len_key, len_value;