--- a/src/dynprog_end.c
+++ b/src/dynprog_end.c
@@ -109,7 +109,7 @@
 static Trieoffset_T *trieoffsets_max;
 static Triecontent_T *triecontents_max;
 
-bool homopolymerp;
+static bool homopolymerp;
 
 void
 Dynprog_end_setup (Univcoord_T *splicesites_in, Splicetype_T *splicetypes_in,
--- a/src/dynprog_single.c
+++ b/src/dynprog_single.c
@@ -91,7 +91,7 @@
 
 #define T Dynprog_T
 
-bool homopolymerp;
+static bool homopolymerp;
 
 void
 Dynprog_single_setup (bool homopolymerp_in) {