1 files changed, 3 insertions, 0 deletions
diff --git a/src/arch/x86/include/arch/io.h b/src/arch/x86/include/arch/io.h
index 50264f653c..955d8e2f91 100644
--- a/src/arch/x86/include/arch/io.h
+++ b/src/arch/x86/include/arch/io.h
@@ -113,6 +113,7 @@ static inline void insb(uint16_t port, void *addr, unsigned long count)
 		"cld ; rep ; insb "
 		: "=D" (addr), "=c" (count)
 		: "d"(port), "0"(addr), "1" (count)
+		: "memory"
 		);
 }
 
@@ -122,6 +123,7 @@ static inline void insw(uint16_t port, void *addr, unsigned long count)
 		"cld ; rep ; insw "
 		: "=D" (addr), "=c" (count)
 		: "d"(port), "0"(addr), "1" (count)
+		: "memory"
 		);
 }
 
@@ -131,6 +133,7 @@ static inline void insl(uint16_t port, void *addr, unsigned long count)
 		"cld ; rep ; insl "
 		: "=D" (addr), "=c" (count)
 		: "d"(port), "0"(addr), "1" (count)
+		: "memory"
 		);
 }