diff --git a/Makefile.am b/Makefile.am
index 302b58e1..69997550 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -993,6 +993,7 @@ fuzzer-api: $(top_srcdir)/unittest/fuzzers/fuzzer-api.cpp
           -I $(top_srcdir)/src/ccmain \
           -I $(top_srcdir)/src/ccstruct \
           -I $(top_srcdir)/src/ccutil \
+          $(LEPTONICA_CFLAGS) \
           $(OPENMP_CXXFLAGS) \
           $< \
           $(builddir)/.libs/libtesseract.a \
diff --git a/unittest/fuzzers/fuzzer-api.cpp b/unittest/fuzzers/fuzzer-api.cpp
index 86ff5214..a1e4e7c4 100644
--- a/unittest/fuzzers/fuzzer-api.cpp
+++ b/unittest/fuzzers/fuzzer-api.cpp
@@ -1,5 +1,5 @@
 #include <tesseract/baseapi.h>
-#include "leptonica/allheaders.h"
+#include <allheaders.h>
 
 #include <libgen.h>     // for dirname
 #include <cstdio>       // for printf