diff --git a/gcc/config/gcn/gcn-hsa.h b/gcc/config/gcn/gcn-hsa.h
index bf7079fbbc6..f5de0d2969f 100644
--- a/gcc/config/gcn/gcn-hsa.h
+++ b/gcc/config/gcn/gcn-hsa.h
@@ -89,7 +89,7 @@ extern unsigned int gcn_local_sym_hash (const char *name);
 #define ASM_SPEC  "-triple=amdgcn--amdhsa "  \
 		  "%{march=*:-mcpu=%*} " \
 		  "%{!march=*|march=fiji:--amdhsa-code-object-version=3} " \
-		  "%{" NO_XNACK XNACKOPT "}" \
+		  "%{" NO_XNACK XNACKOPT "} " \
 		  "%{" NO_SRAM_ECC SRAMOPT "} " \
 		  "%{march=gfx1030|march=gfx1100:-mattr=+wavefrontsize64} " \
 		  "-filetype=obj"