diff --git a/src/pcm/pcm_dmix_i386.h b/src/pcm/pcm_dmix_i386.h
index b28ae787..65ed6d43 100644
--- a/src/pcm/pcm_dmix_i386.h
+++ b/src/pcm/pcm_dmix_i386.h
@@ -149,13 +149,13 @@ static void MIX_AREAS_16(unsigned int size,
 #            ifdef BOUNDED_EBX
 		"\tmovl %[old_ebx], %%ebx\n"	/* ebx is GOT pointer (-fPIC) */
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_EBX
 		  , [old_ebx] "=m" (old_ebx)
 #               endif
 		: [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "esi", "edi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_EBX
 		  , "ebx"
@@ -249,13 +249,13 @@ static void MIX_AREAS_16_MMX(unsigned int size,
 #            ifdef BOUNDED_EBX
 		"\tmovl %[old_ebx], %%ebx\n"	/* ebx is GOT pointer (-fPIC) */
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_EBX
 		  , [old_ebx] "=m" (old_ebx)
 #               endif
 		: [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "esi", "edi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_EBX
 		  , "ebx"
@@ -377,13 +377,13 @@ static void MIX_AREAS_32(unsigned int size,
 #            ifdef BOUNDED_EBX
 		"\tmovl %[old_ebx], %%ebx\n"	/* ebx is GOT pointer (-fPIC) */
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_EBX
 		  , [old_ebx] "=m" (old_ebx)
 #               endif
 		: [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "esi", "edi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_EBX
 		  , "ebx"
@@ -492,13 +492,13 @@ static void MIX_AREAS_24(unsigned int size,
 #            ifdef BOUNDED_EBX
 		"\tmovl %[old_ebx], %%ebx\n"	/* ebx is GOT pointer (-fPIC) */
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_EBX
 		  , [old_ebx] "=m" (old_ebx)
 #               endif
 		: [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "esi", "edi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_EBX
 		  , "ebx"
@@ -600,13 +600,13 @@ static void MIX_AREAS_24_CMOV(unsigned int size,
 #            ifdef BOUNDED_EBX
 		"\tmovl %[old_ebx], %%ebx\n"	/* ebx is GOT pointer (-fPIC) */
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_EBX
 		  , [old_ebx] "=m" (old_ebx)
 #               endif
 		: [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "esi", "edi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_EBX
 		  , "ebx"
diff --git a/src/pcm/pcm_dmix_x86_64.h b/src/pcm/pcm_dmix_x86_64.h
index f543a134..4848ff80 100644
--- a/src/pcm/pcm_dmix_x86_64.h
+++ b/src/pcm/pcm_dmix_x86_64.h
@@ -122,13 +122,13 @@ static void MIX_AREAS_16(unsigned int size,
 #            ifdef BOUNDED_RBX
 		"\tmovq %[old_rbx], %%rbx\n"
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_RBX
 		  , [old_rbx] "=m" (old_rbx)
 #               endif
 	        : [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "rsi", "rdi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_RBX
 		  , "rbx"
@@ -252,13 +252,13 @@ static void MIX_AREAS_32(unsigned int size,
 #            ifdef BOUNDED_RBX
 		"\tmovq %[old_rbx], %%rbx\n"
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_RBX
 		  , [old_rbx] "=m" (old_rbx)
 #               endif
 	        : [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "rsi", "rdi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_RBX
 		  , "rbx"
@@ -364,13 +364,13 @@ static void MIX_AREAS_24(unsigned int size,
 #            ifdef BOUNDED_RBX
 		"\tmovq %[old_rbx], %%rbx\n"
 #            endif
-		: [size] "+m" (size)
+		: [size] "+&rm" (size)
 #               ifdef BOUNDED_RBX
 		  , [old_rbx] "=m" (old_rbx)
 #               endif
 	        : [dst] "m" (dst), [src] "m" (src), [sum] "m" (sum),
-		  [dst_step] "m" (dst_step),  [src_step] "m" (src_step),
-		  [sum_step] "m" (sum_step)
+		  [dst_step] "im" (dst_step),  [src_step] "im" (src_step),
+		  [sum_step] "im" (sum_step)
 		: "rsi", "rdi", "edx", "ecx", "eax", "memory", "cc"
 #               ifndef BOUNDED_RBX
 		  , "rbx"
