diff --git a/src/ccutil/Makefile.am b/src/ccutil/Makefile.am
index 2ab3248b6..073132b5c 100644
--- a/src/ccutil/Makefile.am
+++ b/src/ccutil/Makefile.am
@@ -3,7 +3,7 @@ AM_CXXFLAGS =
 AM_CPPFLAGS =
 
 if !NO_TESSDATA_PREFIX
-AM_CXXFLAGS += -DTESSDATA_PREFIX=@datadir@/
+AM_CXXFLAGS += -DTESSDATA_PREFIX=@datadir@
 endif
 
 if VISIBILITY
diff --git a/src/lstm/Makefile.am b/src/lstm/Makefile.am
index e11981477..4e64a53ed 100644
--- a/src/lstm/Makefile.am
+++ b/src/lstm/Makefile.am
@@ -12,7 +12,7 @@ SUBDIRS =
 AM_CXXFLAGS = $(OPENMP_CXXFLAGS)
 
 if !NO_TESSDATA_PREFIX
-AM_CXXFLAGS += -DTESSDATA_PREFIX=@datadir@/
+AM_CXXFLAGS += -DTESSDATA_PREFIX=@datadir@
 endif
 
 if VISIBILITY