diff --git a/qemu/include/qemu-common.h b/qemu/include/qemu-common.h
index 1b40bbd5..bef8ef5c 100644
--- a/qemu/include/qemu-common.h
+++ b/qemu/include/qemu-common.h
@@ -162,7 +162,6 @@ int qemu_strnlen(const char *s, int max_len);
  * Returns: the pointer originally in @input.
  */
 char *qemu_strsep(char **input, const char *delim);
-int qemu_fls(int i);
 
 /*
  * strtosz() suffixes used to specify the default treatment of an
diff --git a/qemu/util/cutils.c b/qemu/util/cutils.c
index dd0d56a7..f7fa35cb 100644
--- a/qemu/util/cutils.c
+++ b/qemu/util/cutils.c
@@ -127,11 +127,6 @@ char *qemu_strsep(char **input, const char *delim)
     return result;
 }
 
-int qemu_fls(int i)
-{
-    return 32 - clz32(i);
-}
-
 static int64_t suffix_mul(char suffix, int64_t unit)
 {
     switch (qemu_toupper(suffix)) {