diff --git a/core/runtime/internal.odin b/core/runtime/internal.odin
index a38a04cb8..5381ee276 100644
--- a/core/runtime/internal.odin
+++ b/core/runtime/internal.odin
@@ -719,3 +719,8 @@ gnu_h2f_ieee :: proc "c" (value: u16) -> f32 {
 gnu_f2h_ieee :: proc "c" (value: f32) -> u16 {
 	return truncsfhf2(value);
 }
+
+@(link_name="__extendhfsf2")
+extendhfsf2 :: proc "c" (value: u16) -> f32 {
+	return gnu_h2f_ieee(value);
+}
diff --git a/src/checker.cpp b/src/checker.cpp
index 7e69363ff..0111872b9 100644
--- a/src/checker.cpp
+++ b/src/checker.cpp
@@ -1773,6 +1773,7 @@ void generate_minimum_dependency_set(Checker *c, Entity *start) {
 		str_lit("truncdfhf2"),
 		str_lit("gnu_h2f_ieee"),
 		str_lit("gnu_f2h_ieee"),
+		str_lit("extendhfsf2"),
 
 		str_lit("memset"),
 		str_lit("memcpy"),