diff --git a/qmake/fougdatax.pro b/qmake/fougdatax.pro
index 0163578..892f436 100644
--- a/qmake/fougdatax.pro
+++ b/qmake/fougdatax.pro
@@ -28,8 +28,8 @@ HEADERS += \
     ../src/stream.h \
     ../src/task_control.h \
     ../src/transfer.h \
-    ../src/convert.h \
     \
+    ../src/internal/convert.h \
     ../src/internal/ascii_parse.h
 
 SOURCES += \
@@ -37,8 +37,8 @@ SOURCES += \
     ../src/error.c \
     ../src/stream.c \
     ../src/task_control.c \
-    ../src/convert.c \
     \
+    ../src/internal/convert.c \
     ../src/internal/ascii_parse.c
 
 *-g++*:QMAKE_CFLAGS += -ansi -pedantic-errors
diff --git a/src/convert.h b/src/convert.h
deleted file mode 100644
index 06511cc..0000000
--- a/src/convert.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#ifndef FOUG_CONVERT_H
-#define FOUG_CONVERT_H
-
-#include "global.h"
-
-FOUG_LIB_EXPORT foug_real32_t foug_convert_real32(uint32_t val);
-FOUG_LIB_EXPORT uint32_t      foug_convert_uint32(foug_real32_t val);
-
-#endif /* FOUG_CONVERT_H */
diff --git a/src/endian.c b/src/endian.c
index a02535b..8d087fc 100644
--- a/src/endian.c
+++ b/src/endian.c
@@ -1,6 +1,6 @@
 #include "endian.h"
 
-#include "convert.h"
+#include "internal/convert.h"
 
 #ifdef FOUG_HAVE_MSVC_BUILTIN_BSWAP_FUNC
 # include <stdlib.h>
diff --git a/src/convert.c b/src/internal/convert.c
similarity index 100%
rename from src/convert.c
rename to src/internal/convert.c
diff --git a/src/internal/convert.h b/src/internal/convert.h
new file mode 100644
index 0000000..035916a
--- /dev/null
+++ b/src/internal/convert.h
@@ -0,0 +1,9 @@
+#ifndef FOUG_CONVERT_H
+#define FOUG_CONVERT_H
+
+#include "../global.h"
+
+foug_real32_t foug_convert_real32(uint32_t val);
+uint32_t      foug_convert_uint32(foug_real32_t val);
+
+#endif /* FOUG_CONVERT_H */
diff --git a/src/libstl/stlb_read.c b/src/libstl/stlb_read.c
index d0af372..a9936c2 100644
--- a/src/libstl/stlb_read.c
+++ b/src/libstl/stlb_read.c
@@ -1,8 +1,8 @@
 #include "stlb_read.h"
 
-#include "../convert.h"
-#include "../error.h"
 #include "../endian.h"
+#include "../error.h"
+#include "../internal/convert.h"
 
 #include <string.h>