diff --git a/src/common.cpp b/src/common.cpp
index 3fd2da590..3ede77e2c 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -184,7 +184,7 @@ bool is_windows_subsystem_for_linux() {
                 // is bypassed. We intentionally do not include this in the error message because
                 // it'll only allow fish to run but not to actually work. Here be dragons!
                 if (getenv("FISH_NO_WSL_CHECK") == nullptr) {
-                    debug(0,
+                    FLOGF(error,
                           "This version of WSL has known bugs that prevent fish from working."
                           "Please upgrade to Windows 10 1809 (17763) or higher to use fish!");
                 }
diff --git a/src/reader.cpp b/src/reader.cpp
index 62c7d4938..3cf7a7654 100644
--- a/src/reader.cpp
+++ b/src/reader.cpp
@@ -3514,7 +3514,7 @@ static int read_ni(parser_t &parser, int fd, const io_chain_t &io) {
                     clearerr(in_stream);
                 } else {
                     // Fatal error.
-                    debug(0, _(L"Unable to read input file: %s"), strerror(errno));
+                    FLOGF(error, _(L"Unable to read input file: %s"), strerror(errno));
                     // Reset buffer on error. We won't evaluate incomplete files.
                     acc.clear();
                     break;