diff --git a/lib/libc/amd64/Symbol.map b/lib/libc/amd64/Symbol.map
index ab8578150c2..1eedcf3e065 100644
--- a/lib/libc/amd64/Symbol.map
+++ b/lib/libc/amd64/Symbol.map
@@ -71,4 +71,7 @@ FBSDprivate_1.0 {
 	_end;
 	__sys_vfork;
 	_vfork;
+
+	/* used in libm */
+	__ULtox_D2A;
 };
diff --git a/lib/libc/gdtoa/Symbol.map b/lib/libc/gdtoa/Symbol.map
index 157d557068c..4483e9a3adf 100644
--- a/lib/libc/gdtoa/Symbol.map
+++ b/lib/libc/gdtoa/Symbol.map
@@ -12,3 +12,8 @@ FBSD_1.0 {
 	/* FreeBSD additions */
 	strtold;
 };
+
+FBSDprivate_1.0 {
+	/* used in libm */
+	__hexnan_D2A;
+};
diff --git a/lib/libc/i386/Symbol.map b/lib/libc/i386/Symbol.map
index 9fd9dc2051d..2f32e197c68 100644
--- a/lib/libc/i386/Symbol.map
+++ b/lib/libc/i386/Symbol.map
@@ -68,4 +68,7 @@ FBSDprivate_1.0 {
 	_brk;
 	.curbrk;
 	.minbrk;
+
+	/* used in libm */
+	__ULtox_D2A;
 };
diff --git a/lib/libc/ia64/Symbol.map b/lib/libc/ia64/Symbol.map
index a730922a8f3..dd63342e74e 100644
--- a/lib/libc/ia64/Symbol.map
+++ b/lib/libc/ia64/Symbol.map
@@ -69,4 +69,7 @@ FBSDprivate_1.0 {
 	minbrk;
 	.cerror;
 	curbrk;
+
+	/* used in libm */
+	__ULtox_D2A;
 };
diff --git a/lib/libc/sparc64/Symbol.map b/lib/libc/sparc64/Symbol.map
index 73d0ed51c4e..9d11e10a02c 100644
--- a/lib/libc/sparc64/Symbol.map
+++ b/lib/libc/sparc64/Symbol.map
@@ -96,4 +96,7 @@ FBSDprivate_1.0 {
 
 	/* used in src/lib/csu/sparc64/crt1.c */
 	__sparc_utrap_setup;
+
+	/* used in libm */
+	__ULtoQ_D2A;
 };