diff --git a/src/xenia/base/string_util.cc b/src/xenia/base/string_util.cc
index c64820c2e..efeee3fda 100644
--- a/src/xenia/base/string_util.cc
+++ b/src/xenia/base/string_util.cc
@@ -21,37 +21,19 @@
 namespace xe {
 namespace string_util {
 
-inline std::string to_hex_string(uint32_t value) {
+std::string to_hex_string(uint32_t value) {
   char buffer[21];
   std::snprintf(buffer, sizeof(buffer), "%08" PRIX32, value);
   return std::string(buffer);
 }
 
-inline std::string to_hex_string(uint64_t value) {
+std::string to_hex_string(uint64_t value) {
   char buffer[21];
   std::snprintf(buffer, sizeof(buffer), "%016" PRIX64, value);
   return std::string(buffer);
 }
 
-inline std::string to_hex_string(float value) {
-  union {
-    uint32_t ui;
-    float flt;
-  } v;
-  v.flt = value;
-  return to_hex_string(v.ui);
-}
-
-inline std::string to_hex_string(double value) {
-  union {
-    uint64_t ui;
-    double dbl;
-  } v;
-  v.dbl = value;
-  return to_hex_string(v.ui);
-}
-
-inline std::string to_hex_string(const vec128_t& value) {
+std::string to_hex_string(const vec128_t& value) {
   char buffer[128];
   std::snprintf(buffer, sizeof(buffer), "[%.8X, %.8X, %.8X, %.8X]",
                 value.u32[0], value.u32[1], value.u32[2], value.u32[3]);
@@ -61,7 +43,7 @@ inline std::string to_hex_string(const vec128_t& value) {
 #if XE_ARCH_AMD64
 
 // TODO(DrChat): This should not exist. Force the caller to use vec128.
-inline std::string to_hex_string(const __m128& value) {
+std::string to_hex_string(const __m128& value) {
   char buffer[128];
   float f[4];
   _mm_storeu_ps(f, value);
@@ -72,7 +54,7 @@ inline std::string to_hex_string(const __m128& value) {
   return std::string(buffer);
 }
 
-inline std::string to_string(const __m128& value) {
+std::string to_string(const __m128& value) {
   char buffer[128];
   float f[4];
   _mm_storeu_ps(f, value);
diff --git a/src/xenia/base/string_util.h b/src/xenia/base/string_util.h
index cd1879e36..c17d14d61 100644
--- a/src/xenia/base/string_util.h
+++ b/src/xenia/base/string_util.h
@@ -22,17 +22,37 @@
 namespace xe {
 namespace string_util {
 
-extern inline std::string to_hex_string(uint32_t value);
-extern inline std::string to_hex_string(uint64_t value);
-extern inline std::string to_hex_string(float value);
-extern inline std::string to_hex_string(double value);
-extern inline std::string to_hex_string(const vec128_t& value);
+// TODO(gibbed): Figure out why clang doesn't line forward declarations of
+// inline functions.
+
+std::string to_hex_string(uint32_t value);
+std::string to_hex_string(uint64_t value);
+
+inline std::string to_hex_string(float value) {
+  union {
+    uint32_t ui;
+    float flt;
+  } v;
+  v.flt = value;
+  return to_hex_string(v.ui);
+}
+
+inline std::string to_hex_string(double value) {
+  union {
+    uint64_t ui;
+    double dbl;
+  } v;
+  v.dbl = value;
+  return to_hex_string(v.ui);
+}
+
+std::string to_hex_string(const vec128_t& value);
 
 #if XE_ARCH_AMD64
 
 // TODO(DrChat): This should not exist. Force the caller to use vec128.
-extern inline std::string to_hex_string(const __m128& value);
-extern inline std::string to_string(const __m128& value);
+std::string to_hex_string(const __m128& value);
+std::string to_string(const __m128& value);
 
 #endif
 
diff --git a/src/xenia/base/vec128.cc b/src/xenia/base/vec128.cc
index 14bcfe590..84bff1457 100644
--- a/src/xenia/base/vec128.cc
+++ b/src/xenia/base/vec128.cc
@@ -16,7 +16,7 @@
 
 namespace xe {
 
-inline std::string to_string(const vec128_t& value) {
+std::string to_string(const vec128_t& value) {
   char buffer[128];
   std::snprintf(buffer, sizeof(buffer), "(%g, %g, %g, %g)", value.x, value.y,
                 value.z, value.w);
diff --git a/src/xenia/base/vec128.h b/src/xenia/base/vec128.h
index 0b0ccaeee..46f0527fb 100644
--- a/src/xenia/base/vec128.h
+++ b/src/xenia/base/vec128.h
@@ -264,7 +264,10 @@ static inline vec128_t vec128b(uint8_t x0, uint8_t x1, uint8_t x2, uint8_t x3,
   return v;
 }
 
-extern inline std::string to_string(const vec128_t& value);
+// TODO(gibbed): Figure out why clang doesn't line forward declarations of
+// inline functions.
+
+std::string to_string(const vec128_t& value);
 
 }  // namespace xe