diff --git a/findutils/find.c b/findutils/find.c
index cb57665..6f2cbbc 100644
--- a/findutils/find.c
+++ b/findutils/find.c
@@ -425,8 +425,9 @@
 }
 #endif
 
-#if ENABLE_FEATURE_FIND_PERM || ENABLE_FEATURE_FIND_MTIME \
- || ENABLE_FEATURE_FIND_MMIN
+#if ENABLE_FEATURE_FIND_PERM \
+ || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \
+ || ENABLE_FEATURE_FIND_SIZE
 static const char* plus_minus_num(const char* str)
 {
 	if (*str == '-' || *str == '+')
diff --git a/libbb/Kbuild b/libbb/Kbuild
index ecd50a6..6595867 100644
--- a/libbb/Kbuild
+++ b/libbb/Kbuild
@@ -126,3 +126,4 @@
 lib-$(CONFIG_MDEV) += xregcomp.o
 lib-$(CONFIG_LESS) += xregcomp.o
 lib-$(CONFIG_DEVFSD) += xregcomp.o
+lib-$(CONFIG_FEATURE_FIND_REGEX) += xregcomp.o