diff --git a/src/mont/fp_montgomery_reduce.c b/src/mont/fp_montgomery_reduce.c
index 2b10ce5..7b74299 100644
--- a/src/mont/fp_montgomery_reduce.c
+++ b/src/mont/fp_montgomery_reduce.c
@@ -293,7 +293,7 @@ asm(                                \
     " MOVCC  %0,#0            \n\t" \
     " UMLAL  r0,%0,%3,%4      \n\t" \
     " STR    r0,%1            \n\t" \
-:"=r"(cy),"=m"(_c[0]):"0"(cy),"r"(mu),"r"(*tmpm++),"1"(_c[0]):"r0","cc");
+:"=r"(cy),"=m"(_c[0]):"0"(cy),"r"(mu),"r"(*tmpm++),"m"(_c[0]):"r0","cc");
 
 #define PROPCARRY                  \
 asm(                               \
@@ -302,7 +302,7 @@ asm(                               \
     " STR   r0,%1            \n\t" \
     " MOVCS %0,#1            \n\t" \
     " MOVCC %0,#0            \n\t" \
-:"=r"(cy),"=m"(_c[0]):"0"(cy),"1"(_c[0]):"r0","cc");
+:"=r"(cy),"=m"(_c[0]):"0"(cy),"m"(_c[0]):"r0","cc");
 
 /******************************************************************/
 #elif defined(TFM_PPC32)