diff --git a/README.md b/README.md
index 9f3233b5..d0e05fde 100644
--- a/README.md
+++ b/README.md
@@ -404,6 +404,11 @@ methods, here are some links:
 <a name="history"/>
 ## Version history##
 
+<a name="version2112"/>
+### version 2.1.12 ###
+
+**swarm** 2.1.12 removes a debugging message.
+
 <a name="version2111"/>
 ### version 2.1.11 ###
 
diff --git a/man/swarm.1 b/man/swarm.1
index c757a6da..301f6cd4 100644
--- a/man/swarm.1
+++ b/man/swarm.1
@@ -1,5 +1,5 @@
 .\" ============================================================================
-.TH swarm 1 "January 16, 2017" "version 2.1.11" "USER COMMANDS"
+.TH swarm 1 "January 16, 2017" "version 2.1.12" "USER COMMANDS"
 .\" ============================================================================
 .SH NAME
 swarm \(em find clusters of nearly-identical nucleotide amplicons
@@ -344,6 +344,9 @@ New features and important modifications of \fBswarm\fR (short lived
 or minor bug releases are not mentioned):
 .RS
 .TP
+.BR v2.1.12\~ "released January 16, 2017"
+Version 2.1.12 removes a debugging message.
+.TP
 .BR v2.1.11\~ "released January 16, 2017"
 Version 2.1.11 fixes two bugs related to the SIMD implementation
 of alignment that might result in incorrect alignments and scores.
diff --git a/man/swarm_manual.pdf b/man/swarm_manual.pdf
index 20817739..d40cf5fa 100644
Binary files a/man/swarm_manual.pdf and b/man/swarm_manual.pdf differ
diff --git a/src/algo.cc b/src/algo.cc
index 056f7d67..0526ca04 100644
--- a/src/algo.cc
+++ b/src/algo.cc
@@ -205,7 +205,7 @@ void algo_run()
 
           for(unsigned long t=0; t<targetcount; t++)
             {
-#if 1
+#if 0
               printf("seed: %lu target: %lu score: %lu "
                      "diffs: %lu alignlen: %lu bits: %lu\n",
                      seedampliconid,
diff --git a/src/swarm.h b/src/swarm.h
index 1b4b8404..866a877c 100644
--- a/src/swarm.h
+++ b/src/swarm.h
@@ -52,7 +52,7 @@
 #define LINE_MAX 2048
 #endif
 
-#define SWARM_VERSION "2.1.11"
+#define SWARM_VERSION "2.1.12"
 #define WIDTH 32
 #define WIDTH_SHIFT 5
 #define BLOCKWIDTH 32