diff --git a/2006/sloane/Makefile b/2006/sloane/Makefile
index 574c72680..325aba2a4 100644
--- a/2006/sloane/Makefile
+++ b/2006/sloane/Makefile
@@ -40,7 +40,7 @@ include ../../var.mk
 #
 CSILENCE= -Wno-error -Wno-implicit-function-declaration -Wno-implicit-int \
 	-Wno-pedantic -Wno-return-type -Wno-shift-op-parentheses -Wno-unsequenced \
-	-Wno-deprecated-non-prototype -Wno-main
+	-Wno-deprecated-non-prototype -Wno-main -Wno-unused-parameter
 
 # Common C compiler warning flags
 #
diff --git a/2006/sloane/sloane.alt.c b/2006/sloane/sloane.alt.c
index 07968a165..b2fc5b618 100644
--- a/2006/sloane/sloane.alt.c
+++ b/2006/sloane/sloane.alt.c
@@ -27,6 +27,6 @@ A),m   =cos(B);for(k        =0;k<   1840;k++)y=-k
 g)*m-c*         d*e-f*g-l*d*n);if(D>z[o]    )z[o]
 =D,b[o]             =" ..,,-++=#$@"[      N>0?N:0
        ]  ;  }                                   printf(
-       "\x1b["       "H"           );usleep(S);for(k       =1;1841
+       "\x1b["       "H"           );usleep(S);for(k=1;1841
        >k;k++)       putchar       (k%80?b       [k]:10)
        ;  A +=       0.053;B       +=0.037       ;  }  }