diff --git a/cpu/mep.opc b/cpu/mep.opc
index ebe119ae339..33dd63b4b9d 100644
--- a/cpu/mep.opc
+++ b/cpu/mep.opc
@@ -349,6 +349,7 @@ parse_lo16 (CGEN_CPU_DESC cd,
     }
 
   if (**strp == '%')
+    /* xgettext:no-c-format */
     return _("invalid %function() here");
 
   return cgen_parse_signed_integer (cd, strp, opindex, valuep);
@@ -545,6 +546,7 @@ parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp,
     }
 
   if (**strp == '%')
+    /* xgettext:no-c-format */
     return _("invalid %function() here");
 
   return parse_mep_alignu (cd, strp, opindex, valuep);
diff --git a/opcodes/mep-asm.c b/opcodes/mep-asm.c
index e2dda51a977..6e72ddba5a1 100644
--- a/opcodes/mep-asm.c
+++ b/opcodes/mep-asm.c
@@ -305,6 +305,7 @@ parse_lo16 (CGEN_CPU_DESC cd,
     }
 
   if (**strp == '%')
+    /* xgettext:no-c-format */
     return _("invalid %function() here");
 
   return cgen_parse_signed_integer (cd, strp, opindex, valuep);
@@ -501,6 +502,7 @@ parse_unsigned7 (CGEN_CPU_DESC cd, const char **strp,
     }
 
   if (**strp == '%')
+    /* xgettext:no-c-format */
     return _("invalid %function() here");
 
   return parse_mep_alignu (cd, strp, opindex, valuep);