1 files changed, 3 insertions, 1 deletions

diff --git a/src/firejail/appimage.c b/src/firejail/appimage.c
index 976750f8f..0f7ab40ff 100644
--- a/src/firejail/appimage.c
+++ b/src/firejail/appimage.c
@@ -31,17 +31,19 @@
 static char *devloop = NULL;    // device file
 static char *mntdir = NULL;     // mount point in /tmp directory
 
+#ifdef LOOP_CTL_GET_FREE        // test for older kernels; this definition is found in /usr/include/linux/loop.h
 static void err_loop(void) {
         fprintf(stderr, "Error: cannot configure loopback device\n");
         exit(1);
 }
+#endif
 
 void appimage_set(const char *appimage) {
         assert(appimage);
         assert(devloop == NULL);        // don't call this twice!
         EUID_ASSERT();
 
-#ifdef LOOP_CTL_GET_FREE        // test for older kernels; this definition is found in /usr/include/linux/loop.h
+#ifdef LOOP_CTL_GET_FREE
         // check appimage file
         invalid_filename(appimage);
         if (access(appimage, R_OK) == -1) {