diff --git a/src/Makefile.am b/src/Makefile.am
index 215d0319f92..a49ad587160 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -28,7 +28,7 @@ BITCOIN_CORE_H = \
   addrman.h \
   alert.h \
   allocators.h \
-  base58.h bignum.h \
+  base58.h \
   bloom.h \
   chainparams.h \
   checkpoints.h \
diff --git a/src/test/Makefile.am b/src/test/Makefile.am
index fbc79cf996f..cde3a31e2fb 100644
--- a/src/test/Makefile.am
+++ b/src/test/Makefile.am
@@ -32,6 +32,7 @@ endif
 test_bitcoin_LDADD += $(BDB_LIBS)
 
 test_bitcoin_SOURCES = \
+  bignum.h \
   alert_tests.cpp \
   allocator_tests.cpp \
   base32_tests.cpp \
diff --git a/src/bignum.h b/src/test/bignum.h
similarity index 100%
rename from src/bignum.h
rename to src/test/bignum.h