diff --git a/src/builder.c b/src/builder.c
index 1b807eea..265c5d82 100644
--- a/src/builder.c
+++ b/src/builder.c
@@ -113,11 +113,21 @@ int trilogy_builder_write_uint64(trilogy_builder_t *builder, uint64_t val)
     return TRILOGY_OK;
 }
 
+#ifndef TRILOGY_FLOAT_BUF
+#define TRILOGY_FLOAT_BUF
+
 typedef union {
     float f;
     uint32_t u;
 } trilogy_float_buf_t;
 
+typedef union {
+    double d;
+    uint64_t u;
+} trilogy_double_buf_t;
+
+#endif
+
 int trilogy_builder_write_float(trilogy_builder_t *builder, float val)
 {
     trilogy_float_buf_t float_val;
@@ -132,11 +142,6 @@ int trilogy_builder_write_float(trilogy_builder_t *builder, float val)
     return TRILOGY_OK;
 }
 
-typedef union {
-    double d;
-    uint64_t u;
-} trilogy_double_buf_t;
-
 int trilogy_builder_write_double(trilogy_builder_t *builder, double val)
 {
     trilogy_double_buf_t double_val;
diff --git a/src/reader.c b/src/reader.c
index dcb49250..07c7ddb5 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -95,11 +95,21 @@ int trilogy_reader_get_uint64(trilogy_reader_t *reader, uint64_t *out)
     return TRILOGY_OK;
 }
 
+#ifndef TRILOGY_FLOAT_BUF
+#define TRILOGY_FLOAT_BUF
+
 typedef union {
     float f;
     uint32_t u;
 } trilogy_float_buf_t;
 
+typedef union {
+    double d;
+    uint64_t u;
+} trilogy_double_buf_t;
+
+#endif
+
 int trilogy_reader_get_float(trilogy_reader_t *reader, float *out)
 {
     CHECK(4);
@@ -116,11 +126,6 @@ int trilogy_reader_get_float(trilogy_reader_t *reader, float *out)
     return TRILOGY_OK;
 }
 
-typedef union {
-    double d;
-    uint64_t u;
-} trilogy_double_buf_t;
-
 int trilogy_reader_get_double(trilogy_reader_t *reader, double *out)
 {
     CHECK(8);