diff --git a/src/coloredstderr.c b/src/coloredstderr.c
index 4664f0d..e6f1f6a 100644
--- a/src/coloredstderr.c
+++ b/src/coloredstderr.c
@@ -193,7 +193,7 @@ static void handle_fd_pre(int fd) {
 
     int saved_errno = errno;
 
-    if (unlikely(!pre_string || !post_string)) {
+    if (unlikely(!pre_string)) {
         init_pre_post_string();
     }
 
@@ -222,7 +222,7 @@ static void handle_file_pre(FILE *stream) {
 
     int saved_errno = errno;
 
-    if (unlikely(!pre_string || !post_string)) {
+    if (unlikely(!pre_string)) {
         init_pre_post_string();
     }