diff --git a/src/cmd/compile/internal/gc/export.go b/src/cmd/compile/internal/gc/export.go
index 791fc063b7..31e6ab5b6d 100644
--- a/src/cmd/compile/internal/gc/export.go
+++ b/src/cmd/compile/internal/gc/export.go
@@ -209,6 +209,10 @@ func dumpasmhdr() {
 		}
 		switch n.Op {
 		case OLITERAL:
+			t := n.Val().Ctype()
+			if t == CTFLT || t == CTCPLX {
+				break
+			}
 			fmt.Fprintf(b, "#define const_%s %#v\n", n.Sym.Name, n.Val())
 
 		case OTYPE: