diff --git a/include/coverage-32.h b/include/coverage-32.h
index 710ff0cf..d7684708 100644
--- a/include/coverage-32.h
+++ b/include/coverage-32.h
@@ -1,6 +1,9 @@
 #include "config.h"
 #include "types.h"
 
+u32 skim(const u32 *virgin, const u32 *current, const u32 *current_end);
+u32 classify_word(u32 word);
+
 inline u32 classify_word(u32 word) {
 
   u16 mem16[2];
diff --git a/include/coverage-64.h b/include/coverage-64.h
index 54cf0073..0ede5fa5 100644
--- a/include/coverage-64.h
+++ b/include/coverage-64.h
@@ -5,6 +5,9 @@
   #include <immintrin.h>
 #endif
 
+u32 skim(const u64 *virgin, const u64 *current, const u64 *current_end);
+u64 classify_word(u64 word);
+
 inline u64 classify_word(u64 word) {
 
   u16 mem16[4];