diff --git a/include/envs.h b/include/envs.h
index 4fff1e3a..f1314bad 100644
--- a/include/envs.h
+++ b/include/envs.h
@@ -193,6 +193,7 @@ static char *afl_environment_variables[] = {
     "AFL_EXPAND_HAVOC_NOW",
     "AFL_USE_FASAN",
     "AFL_USE_QASAN",
+    "AFL_PRINT_FILENAMES",
     NULL
 
 };
diff --git a/src/afl-fuzz.c b/src/afl-fuzz.c
index eff25c91..5f939115 100644
--- a/src/afl-fuzz.c
+++ b/src/afl-fuzz.c
@@ -1432,7 +1432,7 @@ int main(int argc, char **argv_orig, char **envp) {
 
         setenv("LD_PRELOAD", frida_afl_preload, 1);
         setenv("DYLD_INSERT_LIBRARIES", frida_afl_preload, 1);
-      
+
       }
 
     } else {
diff --git a/src/afl-showmap.c b/src/afl-showmap.c
index 10818905..9b4d21a5 100644
--- a/src/afl-showmap.c
+++ b/src/afl-showmap.c
@@ -774,7 +774,7 @@ int main(int argc, char **argv_orig, char **envp) {
 
   afl_forkserver_t fsrv_var = {0};
   if (getenv("AFL_DEBUG")) { debug = true; }
-  if (getenv("AFL_PRINT_FILENAMES")) { print_filenames = true; }
+  if (get_afl_env("AFL_PRINT_FILENAMES")) { print_filenames = true; }
 
   fsrv = &fsrv_var;
   afl_fsrv_init(fsrv);